What's the origin of "cold" being used roughly for "no (proper) introduction"?

Where does the term "cold calling" originate from?


Is Ubuntu Studio suitable for full-stack software development?

How to switch between low latency and generic kernels?


Spoilers don't support block formatting (and so don't format well)


How can I keep low resolution textures pixelated?


Can someone show the work with some details that $f^{-1}$ is not continuous at $(1,0)$?

Showing that $f:(0,2\pi]\to S^1$ is not a homeomorphism


How can I actually adjust the brightness of my display?

How to change LCD brightness from command line (or via script)?


Is it physically possible for gravity to accelerate an object with mass to the speed of light?

Will an object always fall at an infinite speed in a black hole?


How to get the page number where a Theorem appears?


Remove adjacent duplicate elements from a list

How to keep unique items from a collection of similar items in a list?


Why does C++ have a ";" after a class declaration

Semicolon after class declaration braces


INSTAGRAM AUTOPOPULATES EMAIL ADDRESS ON "CREATE NEW ACCOUNT"

How to stop instagram app remembering / auto-filling in username at login screen, when not yet logged in


Number between less than 15 or equal to 15 or between the two options?


Sum of $\sum\limits_{n=1}^\infty q^n \sin(nx)$


how to tell GRUB to show the user preferred names of OS'es. Ubuntu 18.04


Importing two different classes with same name from different packages

Importing two classes with same name. How to handle?


Inequality question involving a cyclic expression and moduli

Given reals $a_1, a_2, \cdots, a_{n - 1}, a_n$ such that $\sum_{i = 1}^na_1^2 = 1$. Calculate the maximum value of $\sum_{cyc}|a_1 - a_2|$.


Convergence of $\sum_{n=2}^{\infty} \frac{1}{(\ln n)^{2}}$

$\sum_{n=2}^\infty \frac{1}{(\ln\, n)^2}$ c0nvergence


Do objects rotate around the torque vector or its center?


Scanner issue when using nextLine after nextXXX


Sci-Fi - House gets transported to space with brothers (possibly older sister) in it

Looking for a movie where there is a Powerful Board Game played by two brothers?


Not able to install packages in Ubuntu 11.04

How to install software or upgrade from an old unsupported release?


CSS : Are there any possibilities to set element property as other class

Is it possible to reference one CSS rule within another?


How to extend/cut from one mesh to another?

How to intersect objects and delete leftover internal planes?


How to exclude a widget from showing up on a page?

Text Widget in Footer for just 1 page template


Distance between two vectors or two points: vector calculus

Distance between two vectors: Vector Calculus


in Latex how to deal with @manual entry style (jabref)

Question mark or bold citation key instead of citation number


Horizontally and vertically center the image

Best way to center a  on a page vertically and horizontally?


How to save battery on Moto G 2nd generation without installing third party apps?

What can I do to increase battery life on my Android device?


Given that $a > 0$, $b > 0$ and $b > a$, prove the solution of $a^b = b^a$

Given that $x^y=y^x$, what could $x$ and $y$ be?


Where should a physicist go to learn chemistry?


Minimum value of $\frac{a}{b+c}+\frac{b}{a+c}+\frac{c}{a+b}$

Proof of the inequality $\frac{a}{b+c}+\frac{b}{a+c}+\frac{c}{a+b} \geq \frac{3}{2}$


How to pass Unicode characters as JSP/Servlet request.getParameter?


Which characters are valid in CSS class names/selectors?


Where should I post a Windows PowerShell question?

Which computer science / programming Stack Exchange sites do I post on?


I want to output an Array into an Textarea but I'm just encountering an NullPointerException

What is a NullPointerException, and how do I fix it?


Infinite loop with cin when typing string while a number is expected


Why can’t light induce a current while microwaves can?

Does light induce an electric current in a conductor?


Can't read filenames in save dialog box. Names are too faint


Generate class diagram using xcode project

How can I generate UML diagrams from Xcode4


A sequence of partitions that splits up every triple

Minimum number of $k$-partitions of a set of size $n$ to enumerate all $n \choose k$ combinations


Stop WPF animation, storyboard begin in xaml but stopping it in codebehind?


$f$ defined $|f(x) - f(y)| \leq |x - y|^{1+ \alpha}$ Prove that $f$ is a constant.

Function on $[a,b]$ that satisfies a Hölder condition of order $\alpha > 1 $ is constant


how to add files from a folder to archive instead of the folders itself?

creating a tar archive without including parent directory


Is there a way for me to simplify these echos?

How do I iterate over a range of numbers defined by variables in Bash?


Can a virus or malware be bundled with a non executable download?


How to avoid unnecessary deletion and recopying of moved folders when using rsync?

Any way to sync directory structure when the files are already on both sides?


Prove $\sum\limits_{i=0}^n\binom{i+k-1}{k-1}=\binom{n+k}{k}$ (a.k.a. Hockey-Stick Identity)


How to find each  tag in a string and replcae url with absolute url


Allow side-by-side comparison of edited question titles

Please show changed titles separately in edit diffs


I am trying to compare two strings but i am having problem


For prime $p$ and $q$, $2p^2=1+q^2$ are there many solutions?

Pairs of $(p,q)$ such that $p^2 + 1 = 2 q^2$?


Matching the data in input vs output file

sum pair of columns based on matching fields


Randomness in pi and other irrational numbers

Do the digits of $\pi$ contain every possible finite-length digit sequence?


what can I say instead of "out of school" here?

Do you say "outside classes", when mentioning study by yourself?


Unity Giving following error : NullReferenceException: Object reference not set to an instance of an object


Change the url of a web service by reading from the web.config

What should be modified to change the URL of a web service in C#?


Does it matter if I change from Blender render to Cycles and back?

How is Cycles different from Blender Internal?


How do I create a YAML file in order to set a static IP for my /etc/netplan directory? Server 18.04 LTS

How do I use a static IP in Ubuntu 17.10 and newer?


RMM 2015 /P1: Does there exist an infinite sequence of positive integers $a_1, a_2, a_3, . . .$

Proof verification of a number theory problem involving sequences.


How many primes are there on the form $100\cdots 0 1$?

Is there a prime which is the form of $10^n + 1$ except $2, 11, 101$?


Derivation of $1 = x^2+y^2$ with respect to time


Why does my reputation decrease if I downvote another post?

Why do you lose reputation for downvoting answers?


Why does mirror modifiers mirrors on the same side of object that is to be mirrored?

Why does the mirror modifier sometimes give me an overlapping mesh?


Does difficulty affect Keywarden spawn chance?

Where are the key wardens and where are my Infernal Machines to create a Hellfire Ring/Hellfire Amulet?


How do I replace all line breaks in a string with  elements?


Why is my SQL Server consuming so much memory?


How can I read and parse CSV files in C++?


How is an EEPROM different from a Flash memory?

What is the difference between Flash memory and EEPROM?


TV Show identification: 90's live action space kids show in another part of the galaxy

Late 80s - mid 90s Disney TV movie with mechs


How to create "References" section without it being numbered?

Creating unnumbered chapters/sections (plus adding them to the ToC and/or header)


How do you make the possessive form with "He and I"-style subjects?

"My wife and I's seafood collaboration dinner"


How to use custom names and lores in minecraft 1.14.2

Clear named (and lored) item from players inventory 1.13


How can I save a command output to a file in real-time?


What to do when you put two days of formulating a question and it still gets downvoted?

What can I do when getting "We are no longer accepting questions/answers from this account"?


Endomorphism rank: prove that $r_k-r_{k+1} \geq r_{k+1}-r_{k+2}$

If $a_k = \operatorname{rank}(S^k)$, deduce that $a_k - a_{k+1} \geq a_{k+1} - a_{k+2}$


Failed to load JNI shared library "D:eclipse\jre\bin\server\jvm.dll"

Failed to load the JNI shared Library (JDK)


How do I get the version of an application from the command line?


Who manned the turrets in the Falcon during the Battle of Endor?

Why didn't they use the extra cannons on the Millennium Falcon?


Drawn rectangles over image are not in right position after image is resized


"The system network services are not compatible with this version" - ubuntu 14.04

Last upgrade crashes network manager (no internet connection, no applet)


Invalid syntax when running Python script from Command Prompt


Rounded mouth when using subdivision surface


How is the recommended next badge determined exactly?


iOS: How to change app language programmatically WITHOUT restarting the app?


Intel HD Graphics is not working with Debian Stretch

How do I install/update drivers on Debian 9?


Why does crontab not work correctly on my wallpaper script?

Background not changing using gsettings from cron


Difference between "import X" and "from X import *"?

Use 'import module' or 'from module import'?


What is the significance of combining "Gangnam" with "Style"?


Request to burninate the “Unclear what you're asking” close reason

Review closed vote - "unclear what you are asking"


How to know if ~/snap is safe to delete?

Can I delete old snap folders which used to be installed but remain on system?


Good book for self study of functional analysis


Run Time Error on Java: "Null Pointer Exception"

What is a NullPointerException, and how do I fix it?


Sequence converge with an floor function.

Does $\sum\frac{(-1)^{\lfloor \sqrt n\rfloor}}{ n}$ converge?


Natural Deduction $(∀x∃y (P(x) → Q(y))) → (∃y∀x(P(x) → Q(y)))$

Prove or disprove validity: $(\forall x \exists y (P(x) \supset Q(y))) \supset(\exists y \forall x (P (x) \supset Q(y)))$


Python - Connection error when sending large number of requests

What's the maximum number of threads in Windows Server 2003?


How to make a video responsive using the Media:vimeo and Media:youtube modules

Can an embedded video be made responsive?


Height unmixed ideal and a non-zero divisor


Counterexample for the monotonicity of Lebesgue dimension?


button action listener for text field doesnt work


HP Deskjet Ink Advantage 2130/2135 software installation (Ubuntu 20.04)

How to install latest HPLIP on my Ubuntu to support my HP printer and/or scanner?


$sql variable causes mysql_fetch_array() expects parameter 1 to be resource

mysql_fetch_array()/mysql_fetch_assoc()/mysql_fetch_row()/mysql_num_rows etc... expects parameter 1 to be resource


"Service Battery" warning briefly appeared on brand new rMBP. Should I take it back?


JavaScript running without waiting for AJAX request to finish

How do I return the response from an asynchronous call?


Failed to get sources problem in java ide

vscode code navigation "Failed to get sources."


Kotlin crashing application issue SetOnCreate method

What is a NullPointerException, and how do I fix it?


Proving the following inequality without using AM-GM inequality.

Prove $\sqrt{a} + \sqrt{b} + \sqrt{c} \ge ab + bc + ca$


How can I remove fonts that I never use, from libreoffice and linux in general?


Changing ordering of numeric-style citation call-outs


Does text in brackets invoke the "an" vs. "a" rule?

"A/An" preceding a parenthetical statement


Does option "-h" for "ls" display size in MB or MiB and is it consistent over Unix-based systems?


Why is my object disappearing unless is close?

Why does part of my model disappear when I zoom in on it in the 3D Viewport?


Joint Probability Functions - How to work out distribution of X-Y?

Using Joint Distributions and conditional probabilities


how to store passwords for an iOS app like the iOS mail app

Saving Email/Password to Keychain in iOS


How to splice together several instances of InterpolatingFunction?


No more updates for Google Chrome 32-bit


How to install Flash on opera browser on Ubuntu 16.10


Render Image F12 shows non-existing plane after Boolean modifier

Why are there non-visible objects in my final render?


Colonists kill local creature, only to discover they were killing off immature monsters

Story about a deadly alien creature on another planet that has some chemical in its body that makes it faster


How do I extract the value of a solution returned by Solve?

What are the most common pitfalls awaiting new users?


Can an RSA public key be generated without ever knowing the factors?

Building a hard to factor number without knowing its factorization


How to avoid type safety warnings with Hibernate HQL results?


How to use the Parallel package with proper environment options?

How do I set annotations on a facing page?


$\mathbb{S}^4$, the sphere of dimension $d=4$ admits lie group structure?

Is there an easy way to show which spheres can be Lie groups?


Prove $(x+y)^a\leq x^a+y^a$ if $0<a\leq1$ and $x,y\geq0$


Why does the negative sign arise in this thermodynamic relation?


Looking for a science fiction short story called "The Pacer"


What does a sound of infinite Hz sound like?


Selecting large numbers of items from a large list

Best way to select a subset of items in a long list


How can I decide network speed of my dedicated server?

Can you help me with my capacity planning?


A term in English for when you "clink" (?) or touch glasses together

What's the action of banging two beers together called?


How to write an element just after another with javascript?

How to insert an element after another element in JavaScript without using a library?


Should a note be addressed with "Hi all" or "Hi All"?


Can a group be non-empty by definition of 'group'?


How do I restore the default Ubuntu Unity 16.04 login screen?


Find the number of vertices that belong to all the maximum matchings of a general connected graph

Number of vertices present in all maximum matchings


How to resolve server certificate not trusted in postfix on Debian?

Where do you get your CA bundles (crt's) for postfix?


how to convert 0 to 5 V signal into 4 to 20mA current transmitter

Voltage Controlled Current Source integrated circuit? Exists?


Why string with encoding 'UTF-8' have broken symbols when I looping the string


Graph Theory: Prove this group of people can be divided into two groups


How do I remove Elder Scroll: Dragon from my inventory?

How do I remove this Elder Scroll from my inventory?


Offline Installation of Chrome: target doesn't exist


Remove option from "open with..." menu item?

How can I remove / change the "Open With" list?


Problem with understanding the analytic continuation of zeta function.

What is the analytic continuation of the Riemann Zeta Function


Does a caster under the effect of a True Polymorph spell retain their class levels?

Can a polymorphed creature use class features that don't require speech or hand gestures?


Conditions must satisfy $f: (a, b) \to \mathbb{R}$ so that its Taylor series converge to f itself.


Using LINQ to remove elements from a List


How to link controllers in Ruby On Rails?

Best Practices for reusing code between controllers in Ruby on Rails


How can I draw a line with length "a^2"?

If we can construct lines of distance $1$ and $x$, then how do we construct a line of distance $x^2$?


Unable to correct problems, you have held broken packages


Installing Wi-Fi driver for Realtek Semiconductor RTL8723DE Device [10ec:d723]


Use a greek personal font as a second font, the first one is the classic tex one

Using PTSerif-TLF for Cyrillic with TeX Gyre Pagella


Need a simple demo for only check whether background Music running or not?

How to detect that music play in background


How to make it to where players can place a lever on a certain block? Adventure Mode

How can I make a block only be placed on certain other blocks


Can the product of two non invertible elements in a ring be invertible?


distribution upgrade 14.04 to 15.04 halted due to multiple errors

Can I skip over releases when upgrading?


Singular verb after two noun phrases joined by "and" that can be thought of as a single thing


Submitting multiple papers to the same journal simultaneously

Submitting multiple distinct papers to the same journal


Count the occurences of a letter in a string

How do I count the number of occurrences of a char in a String?


How to request "do not start/enable" when installing packages on Ubuntu?

How can I install packages without starting their associated services?


Every n × n-matrix A with real entries has at least one real eigenvalue.

Do real matrices always have real eigenvalues?


Using template parameter as argument in a template

Where and why do I have to put the "template" and "typename" keywords?


Subject-Verb Agreement in "Neither" Comparison (see example)

Which is correct, "neither is" or "neither are"?


How can i enforce data integrity in this setup?


How to set dtypes when converting a dataframe to a numpy array?


Qprocess messes my linux command up (i think). how to fix?

Command working in terminal, but not via QProcess


Why working directory has not been changed with my script?

Why can't I change directories using "cd" in a script?


Could not add ppa:neon/kf5 (ubuntu 14.04)

Unable to locate package kubuntu-plasma5-desktop on 14.04


closures in javascript understanding example


rank of $A = (a_{ij}) \in \mathbb{R}^{n \times n}$ where $a_{ij} := i +j \quad \forall 1 \leq i, j \leq n$.

Let $A$ be a $n\times n$ matrix with entries $a_{ij}=i+j $ . Calculate rank of $A$


App notifications don't dismiss when read on the site

Reading notification on website should clear native Android notification


Sound difference between musical instruments

What are those characteristics by which every sound can be identified uniquely?


Get around an app that won't work on rooted device

How to prevent applications from discovering my phone as being Rooted


How should I go about writing more functional and list based code?

Alternatives to procedural loops and iterating over lists in Mathematica


Creating function in R that processes rasters in Esri grid format?

Processing large amounts of Rasters in R


Find limit of $\sqrt[3]{n+1}-\sqrt[3]{n}$

Finding the limit $\lim_{x\rightarrow \infty} \sqrt[3]{x+1}-\sqrt[3]{x}$


Why do I receive a syntax error when using "and" to declare an array in PyThon?


Android app intermittently shows blank body in questions and answers (multiple sites)


How can I print a hollow rectangle star pattern?

How do i make this script print out multiple boxes?


Querying a view based on a table on which I don't have SELECT permission

SQL Server - How to grant SELECT permission on View that access data in schemas from differents owners?


How to fix sudo after "chmod -R 777 /usr/bin"?


Looking for a present-day sci-fi novel where a devices stops gunpowder from igniting

Looking for title and author of book where gun powder explodes


brackets in equation environment (XeLaTeX)

Equation number enclosing parentheses misplaced with Polyglossia+Hebrew+amsmath


Finding remainder when $5^{99}$ is divided by $13$

Modular exponentiation by hand ($a^b\bmod c$)


Structure containing element which array contains same structures


java.lang.NullPointerException: Attempt to invoke virtual method 'android.text.Editable android.widget.EditText.getText()' on a null object reference

What is a NullPointerException, and how do I fix it?


Can a HTML element have multiple unique ID attributes?


For what types of research designs should (Days|Subject) vs. (1|Days:Subject) random effect specification be used?

Difference between (factor|group) and (1|factor:group) specifications in lme4


"I think we're going to have to be chessmen" - what does "be going to" mean here?


Inserting Objects from an Array into sql


Select values from joined table as single column

Simulating group_concat MySQL function in Microsoft SQL Server 2005?


Installing ubuntu touch on meizu MX4 flyme edition

Can i install ubuntu touch in meizu mx4?


Find all homomorphisms of the ring $ \mathbb{Z_6} $ in $ \mathbb{Z_{15}} $ (verification).

Number of Homomorphisms from $\Bbb{Z}_m$ to $\Bbb{Z}_n$


complex functions which can be approximated by sequence of polynomials

An error in application of Runge's theorem


Reducing the size of the partition used by Windows


Flow rates correlations or Flow rate correlations

"Hidden layer sizes" vs "Hidden layers sizes"


javascript variable is not showing correct value

How to add callback to AJAX variable assignment


Why can't I get code coverage for my trigger, even though I wrote a complete unit test?

How to write a unit-test / test class for trigger?


It there a possible way that I could scale all the objects individually?

Is it possible to group several objects and then manipulate them (scale, rotate, translate) as one?


CLLocationmanager delegate method is not working in xcode6


if the gcd of (a,b) = 1, and a,b divide an integer x, prove that ab ≤x

If $\gcd(a,b) = 1$ and $a,b\mid x$ then $ab\mid x$.


Percentual increase when the old Value is zero

What is the percentage increase to any value when initial value is 0?


How do I install the latest stable version of Firefox?


What is the correct possessive for nouns ending in "‑s"?


Google maps location inaccurate by over 200 miles

I'm getting frequent inaccurate location as the same location, can I make this stop?


how to prove $a+b< (a^{\alpha}+b^{\alpha})^{\frac{1}{\alpha}}$


Which precautions to protect against side-channel attacks on ARX ciphers?

Is there a cryptographic algorithm which is immune to side channel attacks?


How many ancestors alive 1000 years ago does a person have on average?


Why my bibliographic is not being parsed with this author name?

How to properly write multiple authors in bibtex file?


Event binding on dynamically created elements?


ViewPager jumps half the page when switching to next page


How do you parse and process HTML/XML in PHP?


Why are members of $L^2$ the only allowed quantum states?


Can Every Iterative method can be done using recursion?

Can all iterative algorithms be expressed recursively?


convert big number to string without scientific notation

How to avoid scientific notation for large numbers in JavaScript?


Can I compile Java source (which uses Swing and other libraries) into exe so that it does not need JavaSE?

How can I convert my Java program to an .exe file?


Turn multiple line into one liner with custom separator

Turn list into single line with delimiter


TikZ: How to extract / highlight a segment of a curved path

How can I specify a different style for (a difficult to describe concretely) part of a line?


I seem to have lost over 2500 rep today. Could this be on purpose?

What happened to this user's rep, badges, and name?


What are all the marriages and child relationships following the final chapter?


Are there any technical limitations as to why GPS can't have a centimetre resolution?

What is the maximum Theoretical accuracy of GPS?


How do I replace the default GRUB bootloader?

How can I repair grub? (How to get Ubuntu back after installing Windows?)


Collation for international characters (Spanish), php


Question posted on multiple stackexchange website?

Is cross-posting a question on multiple Stack Exchange sites permitted if the question is on-topic for each site?


Mouse cursor flickering and disappearing


How to display the normal values of a face?

Display values of a normal of a selected face


Alignment when not dealing with (just) text

Alignment of different-sized objects in Row


How to level up characters in D&D 5th edition?

Can anybody give me a simple guide to leveling up a character?


Instance of chat user without parent user

Chat parent user doesn't reflect deleted account


Move position of div when breakpoint is triggered

How can I reorder my divs using only CSS?


Any Word Denoting "participating college lecture without enrollment"

Word for going to a university class but without being enrolled?


Why is it considered bad to expose List?


NullPointerException after loading a bitmap from Assets

What is a NullPointerException, and how do I fix it?


How To Make A Button Do An Action Then When I Tap It Again Another Action

How to Make A button do more than one action xcode


Find the volume cut off from the cylinder $x^2+y^2=ax$ by the planes $z=0 $ and $z=x$

Find the volume cut off from the sphere $x^2+y^2+z^2=a^2$ by the cylinder $x^2+y^2=ax$


Why aren't search engines indexing my content?


Why arrow stays tangent to its trajectory?

Why do archery arrows tilt downwards in their descent?


Does my Spanish youth mobility visa automatically change to a tourist visa once it expires? or do i need to get a new stamp?

How to switch from Resident visa to Tourist visa status in the Schengen area?


Cartoon series from the 90's with a Star Wars feel and a toy that allowed you to 'take part' in the fight on screen

Kids’ show with toys to shoot at the on-screen images


Python - Returning longest strings from list


Why is the nontrivial left ideal of $M_ 2(D)$ minimal?


$\phi : A^n \to A^n $ be a surjective $A$-linear map then $\phi$ is injective as well.

A surjective homomorphism between finite free modules of the same rank


finding the center of a circle given 3 points

Get the equation of a circle when given 3 points


How long has Supreme Leader Snoke been around?


What is a NullPointerException, and how do I fix it?


Can I use Clustering with mixed data type in R?

How to use both binary and continuous variables together in clustering?


What is the reasoning behind giving me 100 rep on my main SE account as part of the association bonus?

Linked account +100 rep bonus also applied to account with 200


Interection of conjugate elements forms a normal subgroup

Intersection of conjugate subgroups is normal


Let $z$ be a point in a metric space $(X, p)$. Why is $f: X\to\mathbb{R}$, $f(x)=p(x,z)$ uniformly continuous?

Is the distance function in a metric space (uniformly) continuous?


"a" versus "an" before an acronym that begins with the letter "U"

"a" verus "an" for abbreviations starting with 'U'


Drag and drop based website design/development IDE?

Is there a visual web editor based on bootstrap?


In $\triangle ABC$ with $AB=AC$ and $\angle BAC=20^\circ$, $D$ is on $AC$, with $BC=AD$. Find $\angle DBC$. Where's my error?


Create Ubuntu OS with Installed software


Direct sum of ideals over Dedekind domain


Two body vacuum solutions of Einsteins field equations


Amazon Web Services (AWS) - retrieving reviews - is this still possible?

Is there an Amazon.com API to retrieve product reviews?


Identify that text exceeds parbox height


Set Image Size and Page Orientation When Exporting to PDF

How to control the page size when exporting as a PDF?


Why is my DBN predict only 2 out of 5 classes?

What should I do when my neural network doesn't learn?


Show unconfirmed email addresses in the preferences tab


how to apply a boolean modifier to a collection

I want to apply a difference boolean using a collection and not an object


Last day of next month date timestamp in PHP?

In PHP, is there an easy way to get the first and last date of a month?


NullPointerException while initialising int array member of a class

What is a NullPointerException, and how do I fix it?


Point in declaring the members of java.lang.Object with access privileges?

Why is the clone() method protected in java.lang.Object?


What are the shell's control and redirection operators?


Floating-point inaccuracy with math operations and integers


Running programs in the background from terminal


SQL Server: Examples of PIVOTing String data


Import Duty on electronics being brought to India from the USA

How much electronics and other valuables can I bring duty-free when going to India?


Should i always use smart pointer in C++ 11


Allow only one concurrent login per user in django app

How can I detect multiple logins into a Django web application from different locations?


bus error in C program when trying to assign value to an dereference pointer


Parking a bike with wide tyres in a narrow bike rack


Does this ceiling look like it contains asbestos?


Using cd command to navigate directories in Ubuntu which have special characters

How do I enter a file or directory with special characters in its name?


The Normal Vector of two 3D vector's Cross Product

Why does cross product give a vector which is perpendicular to a plane


Install Ubuntu touch on Android device Motorola G2 XT1068

What hardware does Ubuntu Touch support?


How to go back to previous opened file in Vim?


What's the expected value for a poisoned bottle


Show that the integral of absolute value of $f$ exists if $f$ is integrable.

Show that is $\int_A f$ exists, then so does $\int_A |f|$


Store array objects into ArrayList, hash code printed

How do I print my Java object without getting "SomeType@2f92e0f4"?


Sometimes I get a message saying "Failed to Login" when opening Minecraft

Username and Password not recognized when logging into Minecraft


(Py-) CUDA under Linux from live USB stick

How to install Ubuntu on portable external Hard Drive?


Profile pages throwing 500 error across few sites in the network

Most user profile pages seem to be failing; activity tab unaffected


Event binding on dynamically created elements?


Symbol not found, but Builds and Run OK on Android Studio

Android Studio suddenly cannot resolve symbols


Different request code on activity result


How to get a tool that can only break specific blocks and has a name?

How do I create tools with multiple properties?


What is a NullPointerException, and how do I fix it?


Why do the measurements of this object seem erroneous?


No objects or images to bake to error, driving me nuts

How to bake ambient occlusion into vertex colors?


How to normalize by the covariance matrix?

Bottom to top explanation of the Mahalanobis distance?


What is the difference between cubic splines and cubic b-splines?

What is the relationship between cubic B-splines and cubic splines?


Why do forces have to be mediated by bosons? (Or do they?)


How do I process text before I hand it over to enscript? (Or how do I print UTF8 Mutt messages to PDF?)


Can I install the previous version of Codeblocks "Codeblocks 17.12" on Ubuntu 20.04 lts?

How to install latest Code::Blocks from tar.xz?


How to avoid using onClick on dynamically generated HTML elements (vanilla js)

Event binding on dynamically created elements?


Conservation of energy when slowing an object down


How to pay for toll roads when renting a car in Japan?

How can I pay tolls on Japanese expressways?


Transform a Google Spreadsheet table? Columns by rows


Regarding the value of $X+Y+Z$ if $\frac1X + \frac1Y + \frac1Z = 1$

Find all solutions of ${\frac {1} {x} } + {\frac {1} {y} } +{\frac {1} {z}}=1$, where $x$, $y$ and $z$ are positive integers


Reading and parsing a text file using Java

What is the easiest way to parse an INI file in Java?


First order differential equations with 2 varriables


How do i form the inequality $ -5\le 3\cos x - 4\sin x\le5$?

Prove: $|a\sin x+b \cos x|\leq \sqrt{a^2+b^2}$


What is the difference between "Look who has decided to show up" and "Look who decided to show up"?

When is the present perfect tense used instead of the past tense?


Recommendation letter for a good student that you don't know?

How do you write a letter of recommendation for someone who got an A in your class, but who you've never talked to outside of class?


How to gain reputation on Stack Exchange?

How to get initial reputation on Stack Overflow with the new-user restrictions in place?


Is There a Natural Way to Extend Repeated Exponentiation Beyond Integers?


How to solve this integral: $\int_0^\infty{\frac{ln x}{x^2+2x+4}}\cdot dx$

Value of this definite integral $\int_{0}^{\infty} \frac{ \ln(x)}{x^2+2x+4} dx $


Is it possible to transfer Pokemon from previous 3DS Pokemon games to Sun/Moon?

Which Pokémon games can I use to trade Pokémon with the Sun and Moon versions?


Axiom of Choice: What exactly is a choice, and when and why is it needed?


How to install programs like "wine" or "dolphin"

How do I install software using the Ubuntu Software Center?


Difference between public Boolean isactive and Boolean isactive in PlayFramework Models

What is the difference between public, protected, package-private and private in Java?


Is energy content of a system different depending on the observer?


Is there an easy way to calculate the eigenvalues of the partial transpose of a given matrix?

How do I calculate the eigenvalues of the positive partial transpose of this two-qubit state?


Finding an isomorphic subring of matrices

Find a sub-ring of M(2, $\mathbb{Q}$) which is isomorphic to $\mathbb{Q}$


Why do I Get a Blank Output When echoing $variable?

How do I set a user environment variable? (permanently, not session)


Layers with same coordinate system should align/overlap in ArcMap but do not?


Laptop using 14.04 won't get past login GUI


does unnamed namespace linkage is internal or external or a mix

Unnamed/anonymous namespaces vs. static functions


How exactly does a single laser pulse from LiDAR act?


Correlation coefficient contradicts t-test


Ignore citations in captions in list of figures when numbering


Idiomatic expression about the insignificance of details

Phrase for focusing on unimportant details


Broadcom Wireless for Compaq 615 on Ubuntu 12.04.4 LTS


How to install TP-LINK T2UH Wireless adapter Driver (Ralink mt7610u)


How to match only alphanumeric with regex

RegEx for Javascript to allow only alphanumeric


What are the plataforms/devices Ubuntu touch will run from?

What hardware does Ubuntu Touch support?


Factor 2 in Heisenberg Uncertainty Principle: Which formula is correct?


If $d(x,y)$ is a metric, then $\frac{d(x,y)}{1 + d(x,y)}$ is also a metric


Menu fixed on top after scrolling - Good or Bad?

Fixed-position header and menu on a web page -- is that okay?


Show that a statement is true by induction for $x,y > 0$ and $n \in N$.

Proof of the inequality $(x+y)^n\leq 2^{n-1}(x^n+y^n)$


Splitting a string into 2-letter segments


How can I change an attribute table field type from string to double in QGIS?

Changing data type in attribute table in QGIS


Let $G$ be a non-abelian group of order $2p$ for a prime $p>2$, $A, B \leq G$ s.t $|A|=p, |B|=2$, then $AB=G$

Looking for a simple proof that groups of order $2p$ are up to isomorphism $\mathbb{Z}_{2p}$ and $D_{p}$ .


Proving the probability triple resulting from the extension theorem is complete

Prove that the Extension Theorem is Complete.


How do I start a new community for home repair (appliances, garage doors, roofs)?


How do I find out which version and derivative of Ubuntu is right for my hardware in terms of minimal system requirements?


Finding a PDF of a sum of random variables

Density of sum of two independent uniform random variables on $[0,1]$


Why strict comparison(===) when checking typeof equality?

Which equals operator (== vs ===) should be used in JavaScript comparisons?


Enable TeXstudio's syntax highlighting for custom file extensions

TeXstudio: How to associate tex syntax color scheme to non tex file?


Saving all the project layers in one folder in QGIS

Is there an automatic function in QGIS to package all files in a project for transferability?


How can we prove that $\displaystyle \frac{n^2!}{(n!)^2}\in \mathbb{Z}\;,$ Where $n\in \mathbb{N}$

Using permutation or otherwise, prove that $\frac{(n^2)!}{(n!)^n}$ is an integer,where $n$ is a positive integer.


$\sum \cos$ when angles are in arithmetic progression


How to add listener to a intrinsic marker, like the marker of Park / library?

Google Maps API Click Point Marker (not custom)


How to record iPhone/iPad screen on macOS?


Java: boolean in println (boolean ? "print true":"print false")

What is the Java ?: operator called and what does it do?


Where is the GNOME Extensions error log?

How to get more information about "Error loading extension"?


Why didn't mastery of the Elder Wand move on from Harry?


Creating a shortcut to a program on thumb drive without drive letter

Using relative paths for Windows shortcuts


Is the following usage of the verb "be" correct? Why do people keep telling me it's wrong?

"There is a plethora..." or "There are a plethora..."?


Design for Facebook authentication in an iOS app that also accesses a secured web service


Accessing dataframe column causes Error in sort.list(y) : 'x' must be atomic for 'sort.list'

Accessing column with df[col] gives: Error 'x' must be atomic for 'sort.list'


How can I get rid of all script blocks in html files?

Script to remove certain span elements from an HTML file


Story where aliens visit earth in a cucumber spaceship

Ultra-obscure BBC TV programme about microscopic spacemen


&& and ; chaining commands: does C get executed in A && B ; C if B returns a non-zero exit status?

What's the difference between semicolon and double ampersand &&


Deciphering the following line of code: new (void*) custom_func_pointer(std::forward(function))

What uses are there for "placement new"?


I Can't login as root with su command, but I can with SSH


Cross Validation in an Imbalanced data set

When is unbalanced data really a problem in Machine Learning?


Determinant of a special $n\times n$ matrix


What is the difference between Class.this and this in Java


Is there a term for the case when the author does not see the flaws of their own project?

Term for being unable to see glaring errors after working for some time on a task?


Articles: When do I use "a", "the", or "__"?


Splitting Line.shp at Point.shp with Python/ogr

Efficient algorithms to split and join lines?


I am quite unsure of how echo command works in the following two scenarios


Open problems in Galois theory (other than the IGP)

What are some major open problems in Galois theory?


When is it harmful to add percent character at end of lines in a \newcommand, or similar


How can I remove the space after qlineedit get text?


Intrinsic function in CUDA FORTRAN won't work

CUDA FORTRAN: function gives different answer if I pass variable instead of number


How can I merge properties of two JavaScript objects dynamically?


Prove that $A - (B \cap C) = (A - B) \cup (A - C)$

de morgan law $A\setminus (B \cap C) = (A\setminus B) \cup (A\setminus C) $


Screen flickers / goes black for 1-2 seconds when redrawing on 16.04 - single monitor, R9 380

Ubuntu 14.04.5/16.04 and newer on AMD graphics


Electron falling into an extreme black hole and Cosmic Censorship Hypothesis

What prevents the accumulation of charge in a black hole?


Optimal Ways of Installing and Maintaining Ubuntu Installations while off line (Starting with DVDs)?

How can I install software or packages without Internet (offline)?


Can you copy blocks on Minecraft Bedrock?

How do I get a block with data to place myself?


What is behind the definitions of work and energy?


Why isn't acceleration always zero whenever velocity is zero, such as the moment a ball bounces off a wall?

How can an object's instantaneous speed be zero and it's instantaneous acceleration be nonzero?


Is there a power saving application similar to Jupiter?


Trying to print to screen the events etc, nothing printing

What is a NullPointerException, and how do I fix it?


Is it possible to include a quotation mark as part of an nsstring?


How do I resolve unmet dependencies after adding a PPA?


I'm having trouble installing Oracle java jdk

How can I install Sun/Oracle's proprietary Java JDK 6/7/8 or JRE?


Declaring a common variable in a header gives linker error


Accessing database causing NetworkOnMainThread Exception error in Android

How to fix 'android.os.NetworkOnMainThreadException'?


How does centering the data get rid of the intercept in regression and PCA?


number of odd coefficients in the expansion of $(1+x)^n$


Disable navigation swipe on Chrome browser in javascript

Stop chrome back/forward two finger swipe


WIndows boot loader not appearing in bios boot order after upgrading to ubuntu 19.04

Unable to boot into Windows after installing Ubuntu, how to fix?


Function with AJAX POST call - how to get it to wait (async: false seems not to work)?

How do I return the response from an asynchronous call?


why the search result shown in default language only ?


python, importing function from other file which uses variable in the functions file

UnboundLocalError on local variable when reassigned after first use


Is there a car faster then the adder in GTA V?

What is the fastest car in GTA 5, and where can I find it?


If $|f(z) |\leq 1 + |z|$, show that $f(z) = az + b$

Showing that $f$ is linear function if $\forall z \in \mathbb{C}$, $|f(z)| \leq 1 + |z|$.


Routing sound in Windows 7 to separate devices

Routing Applications sound to different sound device? (Windows)


How to hide keyboard - of - UITextView iPhone - by return Key

How to dismiss keyboard for UITextView with return key?


Strange verbatim issue in beamer even after issuing `fragile` option

tcolorbox listing error using beamers begin{frame}


Can I enter Poland with Italy Schengen visa without entering Italy?

Should my first trip be to the country which issued my Schengen Visa?


Help with title of book about mind control

A science fiction story about a headdress that allows one human to control and experience another human's body


intersection of the empty set and vacuous truth


A 'native text' file appears on my desktop whenever I launch Minecraft


Representation of the delta distribution as an element of the dual of $H^1$

Show that there exists a unique $v_0 \in H^1(0,1)$ such that $u(0)=\int_0^1(u'v_0'+uv_0), \forall u \in H^1(0,1)$


Given ring $F[X]/(X^2)$ why is the ideal (X) the unique maximal ideal of the ring

Is quotient of a ring by a power of a maximal ideal local?


Detect Symbolic Links, Junction Points, Mount Points and Hard Links

Check if a file is real or a symbolic link


Branch starting not from bark using hair particle system


Creepers keep breaking my blocks after disabling it in 1.8.7?

How can I disable creepers' block damage on my Minecraft server?


Why were the effects of the ring instant for Smeagol and not for Bilbo?

Why did Sméagol turn into a 'creature' when addicted to the ring, but not Bilbo Baggins?


Reporting a bug about reCAPTCHA integration to blogs


Simple way to draw Hadamard matrices (black/white grids) from external input

Drawing a large binary matrix as colored grid in TikZ


AngularJs doesn't bind ng-checked with ng-model

AngularJS: ng-model not binding to ng-checked for checkboxes


Is the Sigma 18-200 F3.5-6.3 DC Macro compatible with full-frame Nikon DSLRs?

What do all those cryptic number and letter codes in a lens name mean?


List changes unexpectedly after assignment. Why is this and how to prevent it?


Programming Languages for Bioinformatics


Recovery of quick cast and arcane attunements

When do "per day" spell-like abilities recover in 3rd edition?


PHP login system: Remember Me (persistent cookie)


Difference between present perfect simple and present perfect continuous

Is there any difference between Present Perfect and Present Perfect Continuous?


Prove that A is isomorphic to the subring of K[T] generated by $T^2$ and $T^3$

Verifying that the ideal $(x^3-y^2)$ is prime


(x86_64 linux assembly) Why printf with float format string work only with rsp % 0x10 = 0

Printing floating point numbers from x86-64 seems to require %rbp to be saved


"I would rather did it myself" or "I would rather do it myself"?


Why does the Workplace's featured question tab show a question without a bounty?

Questions with ended bounties are not being removed from the "featured" tab


How can I determine the direction of the balls after collision in billiards game?

How can I know in which direction 2 balls will go in billiard game?


How can I prove or disprove that the formula $2^{2{^{2^{2^2\dots}}}}+1$ gives a prime number?


How to convert 2's complement to its corresponding signed counterpart natural to the machine?

Efficient unsigned-to-signed cast avoiding implementation-defined behavior


For any triangle with sides $a$, $b$, $c$, show that $a^2b(a-b)+b^2c(b-c)+c^2a(c-a)\ge 0$


How do I change mirrors in Ubuntu Server from regional to main?


A way to dynamically save files in Matlab?


How to roll back Ubuntu to a previous version?


Why does C have the %n format specifier, despite the obvious downsides?

What is the use of the %n format specifier in C?


What happens to reputation earned after the 200 rep limit is exceeded?


Preventing Append_management from adding target to Table of Contents?

Prevent newly created feature class being automatically added by ArcPy (Python AddIn) to Map Document?


Does relative velocity also depend on the distance from which moving object is being viewed?

Why do far away objects appear to move slowly in comparison to nearby objects?


We can see the shrine "become/becomes" big

"Heard me [infinitive]" vs. "heard me [present participle]"


What is the two-pin polarity indicator for a PCB?


Prove that the map $f:A\rightarrow B$ is injective if and only if $f$ has a left inverse.

Finishing a proof: $f$ is injective if and only if it has a left inverse


How to remove duplicate copies of all kinds of files from another directory

How to find (and delete) duplicate files


Difficult inequality : $\sum_{n} |z_{n}|\le \pi \left|\sum_{k} z_{n_k}\right|$


Capturing counter value in Javascript closure

JavaScript closure inside loops – simple practical example


How to make a query with AND operator between rows

Select values that meet different conditions on different rows?


How to Access data returned from Apex class in JS controller using Lightning web component


Biblatex problem, the list doesn't appear

Question mark or bold citation key instead of citation number


New versions of biblatex & biber - any changes to subfile commands?


bluej: how to create object with Date type

How to convert a date String to a Date or Calendar object?


The value of $i^i$ - is my method contradictory?


Etiquette for awarding bounty if none of the answers address the question completely but found to be equally useful

Can't decide who to award the bounty to, they're all worthy


Sending secure POST requests to MySQL/PHP server from Android


How consistent is the size of std::size_t


Get new c# guid into javascript function using razor in asp.net mvc


Using a system with a Linux-based OS as bridge (for WIFI and ETH)


How can I check the status of a moderator chat flag?

Can we get a flag history for chat's moderator attention flags?


Prove that $∂A$ is closed given $∂A = \text{Cl}(A) − \text{Int}(A)$


Where are all islands and discoverable locations?


PS4 Controller not connecting to PS4 and won't reset?


Can Objective C determine the caller object reference at runtime (reflection)?


What is the difference between these two off-topic flags?

The generic off-topic flag reason has different wording in the Android app


Some areas of the mesh are dark (Shadow artefacts)


Want to render animation nodes text animation on sheepit

Does rendering on sheepit not render animations done using animation node?


Derivation of an identity with beta function.


How to validate memory correctness with VisualStudio?

Is there a good Valgrind substitute for Windows?


If G contains a normal subgroup $N \cong \mathbb{Z}_2$ and $G/N \cong \mathbb{Z}$, then $G\cong \mathbb{Z}\times \mathbb{Z_2}$.

If $G$ contains a normal subgroup $H \cong \mathbb{Z_2}$ such that $G/H$ is infinite cyclic, then $G \cong \mathbb{Z} \times \mathbb{Z_2}$


Prove that $\lim_{x \to \frac{2}{\pi}}\lfloor \sin \frac{1}{x} \rfloor=0$ in the $\epsilon$-$\delta$ way

Proving a limit of a trigonometric function: $\lim_{x \to 2/\pi}\lfloor \sin \frac{1}{x} \rfloor=0$


How to get Google search results and exclude sub-pages?

Search Google for domains rather than pages


unzip the latest zipped file from a list of zipped files


Class definition parameter vs. Normal class definition

What is the difference between old style and new style classes in Python?


What is the word prototype used for in Javascript?


How are these Chinese spam iCloud Calendar/Reminders invitations sent to me?


How can I sharpen my chef's knives at home?


Why is "insufficient storage" wrongly reported when installing an .apk via adb?

Google Play: Error downloading app - insufficient space


Know if an interface has any implementation class in current class path

Find Java classes implementing an interface


AC Adapters: Do watts have to match? / Is 19v close enough to 20?

Choosing power supply, how to get the voltage and current ratings?


Prevent scrolling of parent element when inner element scroll position reaches top/bottom?

prevent Scroll bubbling from element to window


How to find the shortest way to destination

How to calculate the shortest path between two points in a grid


What is a NullPointerException, and how do I fix it?


Difference between accessing properties with this.someProperty vs someProperty directly in Java


How to study/prepare for the Salesforce Developer Certification


How to make comparison of objects `a == b` to be true?


need help in javascript understanding a line

JavaScript property access: dot notation vs. brackets?


Select statement to call stored procedure generating error

Execute a Stored Procedure in a SELECT statement


what will happen if Create same Object multiple times in main method and constructor as well


Limit $\lim_{n \to \infty} \frac{n!}{n^n}$


If something is not moving in space, is it moving on the time axis at the speed of light?

Why are objects at rest in motion through spacetime at the speed of light?


If $\gcd(a,x)=1$, then $a\mathbb N+b, x\mathbb N+y$ intersects.

Deriving Chinese Remainder Theorem from gcd Bezout identity


How to read value of only one variable of a python script in another python script

What does if __name__ == "__main__": do?


Warning: preg_replace(): Unknown modifier


option to dismiss unanswered questions from my tags view

I would like a way to mark a question in the Unanswered "my tags" page as something I'm not interested in or able to answer


Why the mysql query is not evaluated properly?


Bibliography on different systems is empty

Using BibTeX/biblatex to make a list of references without having citations in the body of the document?


Is a 2.4 GHz Intel Core 2 Duo better than a 2.0GHz dual-core Intel Core i5 with turbo Boost up to 3.1GHz?

What is the new turbo boost in the MacBook line?


Prove that $n^n>\left(\dfrac{n+1}{2}\right)^{n+1}$ for all positive integer $n>1$.

Prove that ${\left(\frac{x+1}{2}\right)}^{x+1} \leq x^x$


Does gravity have a gauge symmetry group?


Greedy vs. Reluctant vs. Possessive Qualifiers


Question title overlap in new design when title is longer


Difference between id and name attributes in HTML


What's the difference between "someone" and "somebody"?

Is there a subtle difference between "somebody" and "someone", "anybody" and "anyone"?


jQuery AJAX inserts everything into DB... BUT the image?

How can I upload files asynchronously with jQuery?


Why is VirtualBox (Windows host) only allowing 32-bit Linux guests?

Why does virtualbox only have 32-bit option, no 64-bit option on Windows 7?


GNOME System Monitor is showing tons of file systems (18.04.3)

Why are all snaps being mounted and listed as block devices or partitions for Ubuntu 18.04?


How to add a switch to android action bar?


Is it possible to view a Java class files bytecode

Is it possible to view bytecode of Class file?


How can I clear out unneeded folders in the C:\Program Files\WindowsApps folder?

Editing/Creating files in C:\Program Files\WindowsApps


Expected max number of tries needed to get heads in n samples

Expectation of the maximum of i.i.d. geometric random variables


How do you calculate program run time in python?

How do I get time of a Python program's execution?


a word for the existing state of affairs before you change something

looking word for: current state or the state before a change


How can I disable autostart of mysql server?

How to stop mysql from running at boot time?


Two sidebars in Beamer for two presentations in one tex file

How to allowbreak on Beamer Berkeley left-hand-side navbar?


Is SEO effected by having a forward slash for the homepage?

Canonical URL for a home page and trailing slashes


Tool to analyze and track resource usage on Windows XP

How to log processes throughout workday?


How to Undelete A Post Deleted by System or Community?

How can a question deleted by community be undeleted?


How can I run python script on Windows 7, with ability to enable/disable apperance of window and on taskbar?

How to build a SystemTray app for Windows?


Looking for a word that means to give for free, but is distinct from "donate"

A word similar to "Donate" but more freely provided to


Warning: oci_parse(): ORA-01756: quoted string not properly terminated - Where? I cannot find it


python regex need help to enumerate data

What special characters must be escaped in regular expressions?


How do I run executable scripts in Nautilus?


for loop doesn't work when "{0..$var}" is used

Using user input to determine how many times a for loop iterates


How to select unlinked  urls with RegExp in JavaScript


Ubuntu Software Center doesn't open in Ubuntu 20.04

Ubuntu Software doesn't open in Ubuntu 20.04


Suppose a group G is generated by two elements a and b. If ab=ba, prove that G is abelian.

if G is generated by {a,b} and ab=ba, then prove G is Abelian


Is there a term for an issue or activity that occurs only until the moment that you ask someone else to watch?

Phrase for a situation where a problem disappears when you are about to fix it, but reappears later


why when assigning the returned value to int, it by itself reduces by one?


My ex employer wants me to draft my own reference letter to the MSc program, is it unethical?

Is it acceptable to write a reference letter for yourself?


Minkowski diagram and length contraction


How should I be handling readied actions and turn order?


Term describing emotional agreement with an argument regardless of the validity of the argument itself?

Word that describes being "patriotic" for something that is not a country?


What are scopes in context of ruby on rails?


Is it possible to pass two arguments in c?


How to determine which lightdm greeter is in use?


Are there any good UIScrollView Tutorials on the net?


Continuous and discrete basis of Hilbert Space

Hilbert space of harmonic oscillator: Countable vs uncountable?


How do I name images by barcode as I am photographing?

How can I get barcode-scan information into my photo metadata, onsite, untethered?


Can two nonisomorphic groups have the same subgroup lattice?

Does the order, lattice of subgroups, and lattice of factor groups, uniquely determine a group up to isomorphism?


Using Math.round to round to the nearest tenth?

How to round a number to n decimal places in Java


Add a new column between other dataframe columns

Add (insert) a column between two columns in a data.frame


correction made, needed to implement a switch statement and prompt for user input on song selection


"This computer currently has no detected operating systems" when installing


How to update profile photo on stackexchange.com (network profile)?

Created a new user at Stack Exchange, but did not get the right username


Linking with uncompiled shader in Ubuntu


Running programs in the background from terminal


What are the steps to install Balena Etcher to the 16.04 Launcher toolbar?

How can I create launchers on my desktop?


Minimizing $\cot^2 A +\cot^2 B + \cot^2 C$ for $A+B+C=\pi$

In a $\triangle ABC,$ Evaluation of minimum value of $\cot^2 A+\cot^2 B+\cot^2 C$


Is the order of static class initialization in C# deterministic?


Using HashMap in Java to make a morse code

What is the easiest/best/most correct way to iterate through the characters of a string in Java?


Create a line perpendicular to an existing line in ArcGIS


How do you manage translations for your Android app?

Android: Get missing translations for strings-resources


How to change the speed of video playback


Hide custom button in Standard Pagelayout

End of javascript sidebar workarounds? (Salesforce Classic / Aloha)


Access rows in an automatically generated table using Javascript+JQuery

Event binding on dynamically created elements?


Problem averaging multiple series of data

Combining values in one column (or part) when values in another column (or part) match


Passing scanner to method to read a file throws nullpointerexception

What is a NullPointerException, and how do I fix it?


How to exclude a field when a search is done?

How do I unset/hide certain fields from being indexed by the core search module?


NSUnknownKeyException that I can't find a fix for

Xcode - How to fix 'NSUnknownKeyException', reason: … this class is not key value coding-compliant for the key X" error?


Projection between EPSG:4326 and EPSG:4269 using pyproj does nothing

Converting NAD83 (epsg:4269) to WGS84 (epsg:4326) using pyproj


Retired XP machines - which version to install?

How do I find out which version and derivative of Ubuntu is right for my hardware in terms of minimal system requirements?


How to get to my Gmail on a computer where someone has his Google account?

How can I log into a different Google account?


Plotting a 4dimensional spherical function In mathematica

Is there something like DensityPlot3D to visualize atomic orbitals?


Adding a class to an ArrayList, but got NullPointerException


LaTeX - Let table be page wide in the IEEE template

Placing a figure in the bottom of a page spanning the two columns of an IEEE document


How does a delegate remember it's parameters?

The scope of variable in inner anonymous method


How likely is it that the mass of all humans was generated by the same supernova?

How many times has the matter in our solar system been recycled from previous stars?


How can i add items to sets in a list in python?

List of lists changes reflected across sublists unexpectedly


How to deal with conundrum of `NullPointerException`?

What is a NullPointerException, and how do I fix it?


Solving a transcendental equation using Lambert's W function

How can one find the zeroes of $f(x)=ae^{bx}+cx+d$?


The new top bar is out on meta. Consider it a beta


Which one is bigger? $e^{\pi} $ or $\pi^e$

Comparing $\pi^e$ and $e^\pi$ without calculating them


How should I handle questions which are answered in the comments?

What should be done with questions that have been resolved as a comment instead of an answer?


Finding a digit in the sequence of all natural numbers.

$n$-th digit in the sequence of natural numbers


Java 8 - External Iteration performing better than Internal Iteration?

How do I write a correct micro-benchmark in Java?


LUDecomposition does not give the expected results


How to get jboss7 version in java programatically through?

How do I programmatically obtain the version in JBoss AS 5.1?


What exactly the getter and setter method does?


Rigorous proof that surjectivity implies injectivity for finite sets


Attempt to invoke virtual method on a null object reference using firebase phone authetication on android

What is a NullPointerException, and how do I fix it?


Site-only or Global Moderators? + Moderator privileges?

Who are the diamond moderators, and what is their role?


python program to replicate the given matrix

conversion from matlab to python of repmat


OpenCV 2.4.6.1: Error while grabbing frame from camera


How is the size of a C++ class determined?


Lag in playing video in android emulator

Why is the Android emulator so slow? How can we speed up the Android emulator?


HDMI: TV crops 16:9 from graphics card, 1-2 cm of image borders missing


hyperlink the whole citation call-out not only the year

hyperlink name with biblatex authoryear (biblatex 1.4b)


Passing a Taxonomy term via URL to add content form a content type in Drupal 7

Link to create new node with taxonomy term from url already selected?


When to use induction to prove something

Show that all horses are of the same color.


No-longer-valid comments that were responded to

Right way to handle obsolete comments when some of them are mine?


How to install VirtualBox to use Windows or other OS?


Where to focus when taking a portrait of 2 people?

How can I get everything in focus? (Why can't my camera just use all of its focus points at the same time?)


How can I install ffmpeg on Lubuntu 14.04?

Is FFmpeg missing from the official repositories in 14.04?


How to diagnose a search engine ranking drop?


How do I inform a player another player passed by a certain place?

Is there a way to display a player name in /tellraw command?


Footer relative is not always at the bottom of the page

How do you get the footer to stay at the bottom of a Web page?


Synaptics Touchpad : solving 2 finger problem triggered by resting palm


Particle spin as evidence of space-time torsion

Spacetime Torsion, the Spin tensor, and intrinsic spin in Einstein-Cartan theory


If derivative of f(x) is f'(x), then what is the integral of (f'(x))^2 in terms of f(x)?


Why Wikipedia does not have duplicate content issues with search engines?

What is duplicate content and how can I avoid being penalized for it on my site?


Does gravity exert more "power" when an object is traveling faster?

Is kinetic energy a relative quantity? Will it make inconsistent equations when applying it to the conservation of energy equations?


how can I change round bracket to square bracket using biblatex-chicago


Why is my crontab not working, and how can I troubleshoot it?


Issue with overwritten abstract in two-column elsarticle


A graph (G) is only connected as a topological if G is connected as a graph.

(A question regarding:) the graph associated with an open cover of a topological space.


Why are all the textures in my file pink?


Limit of integral expression approaches maximum of function

Finding $\lim\limits_{n \rightarrow \infty}\left(\int_0^1(f(x))^n\,\mathrm dx\right)^\frac{1}{n}$ for continuous $f:[0,1]\to[0,\infty)$


Dealing with a single-qoute issue. Possibly related to Apple users?


How to align the view or a camera to a certain face or object

How do I align the viewport to a face normal?


Warlock spellslots conversion to sorcery points?

Can I use Pact Magic spell slots gained on a short rest to gain sorcery points?


Does self-answering a question increase reputation?


What is the difference between Mem and Swap?

Is there a difference between SWAP and Cache memory?


How to convert total seconds value to string in 'hours minutes seconds' format

What is the best way to convert seconds into (Hour:Minutes:Seconds:Milliseconds) time?


Ubuntu 15.10 freeze on Acer E11/Bay Trail CPU

System freezes completely with Intel Bay Trail


Attempt to invoke virtual method : SQLite

What is a NullPointerException, and how do I fix it?


Reserve windows 10 app not appearing in notification bar

Why don’t I have the Get Windows 10 icon?


Write a method that returns the highest and lowest value of an array

What's the simplest way to print a Java array?


How to prove that r is a double root if and only if it is a root of a polynomial and of its derivative.


How to evaluate $ \lim \limits_{n\to \infty} \sum \limits_ {k=1}^n \frac{k^n}{n^n}$?


Same memory usage of matrices with different size

How to compute the size of the allocated memory for a general type


WUBI error after installation on Windows 8 laptop

How do I install Ubuntu alongside a pre-installed Windows with UEFI?


how to show some rows in multiple columns and one row?

QUERY - pivot multiple columns, variable number of rows


Crash or "segmentation fault" when data is copied/scanned/read to an uninitialized pointer


Cross-thread operation not valid: Control accessed from a thread other than the thread it was created on


Combine two pandas Data Frames (join on a common column)


A collective name for eating related items

What is the best word for "kitchen products" on an e-commerce website?


All lines are working except the last one, saying no operator "+" matches the operands

How to concatenate a std::string and an int


What do $< and $@ represent in a Makefile?


enclosing a lstlisting environment inside my own environment using matlab-prettifier


For positive, decreasing $a_n$, must $a_n=O(1/n)$ for the series $\sum_{n=1}^{\infty} a_n$ to converge?

Show that if $a_n$ is descending and $ \sum a_n$ is convergent then $na_n\to 0$


Is there a way to run a method/class only on Tomcat/Wildfly/Glassfish startup?


Unable to change payment information to NONE in iOS Appstore


Tension as a function of distance from the centre of a rod AB rotating about its end A

A rod of length $L$ & mass $M$ is rotating in a circle about one end then calculate tension in the rod at a distance $x$ from the support


How to insert a pdf figure at the right position

How to influence the position of float environments like figure and table in LaTeX?


the exercises suggested/the suggested exercises

Noun-adjective reversal - was it ever in use in plain speech?


MacBook [Pro] - how many displays, what resolution/frequency?


Mathematical symbols not displaying in comments

Android app doesn't render LaTeX content in comments


My pixel art looks weird in the game view in Unity


Book where artistic people are thrown into a lake of acid; kids get teleported to a world where magic is real

Teen fantasy book series about a world where people who showed creativity could learn magic, and were killed for it


check for the last item in a javascript array

How to catch last iteration inside $.each in jQuery?


I am a sockpuppet; may I exist if I have a real purpose?

How should sockpuppets be handled on Stack Exchange?


Story in a domed city: Jester or Joker whose job is to create chaos to prevent the city stagnating

Story about an intelligent, walled city; people are reproduced by machines, protagonist rebels and tries to leave


How to fetch one file from two paths in unix?


5 odd-numbered taxis out of 9 to 3 airports

Intro to statistics question (probability)


What does the caret (‘^’) mean in C++/CLI?


Is there evidence to suggest that Supreme Leader Snoke is Darth Plagueis?


Prevent laptop from going to suspend mode

How do I disable my system from going to sleep?


For Switching Applications - BJT or MOSFET

When is a MOSFET more appropriate as a switch than a BJT?


Is variable contribution to the top principal components a valid method to asses variable importance in a k-means clustering?

What is the relation between k-means clustering and PCA?


Trying to identify a 1980s sci-fi short story about a robotic spaceship that returns to Earth after being sent to fight aliens

Space ship manned by only AI returns home to a different earth, back in time


Array operations: -X[array_name] result?

With arrays, why is it the case that a[5] == 5[a]?


How to fix "Headers already sent" error in PHP


What does "so much as" mean in these three sentences? What grammatical function does this phrase serve?


Loopback to forwarded Public IP address from local network - Hairpin NAT


Does filing a patent application require disclosure in the paper publication process?

Does applying for a patent first make it more difficult to publish (or vice versa)?


Moved site to server software to PHP 5.3: copy function is not longer working. Gives error: [function.copy]: failed to open stream: Permission denied

php copy function, failed to open stream: Permission denied


Adjust volume via commandline so that volume notify pops up


Can't view deleted questions via Android app


In Linux, does using route to blackhole an IP result in better performance than dropping in iptables?


Can You "Turn Off" Order of Preference For Wi-Fi Networks

How can I set the priority of Wi-Fi networks on my iOS device?


Does $f(x)$ converge when $x$ goes to infinity if $f'(x)$ goes to $0$ when $x$ goes to infinity?

Proving that $\lim\limits_{x\to\infty}f'(x) = 0$ when $\lim\limits_{x\to\infty}f(x)$ and $\lim\limits_{x\to\infty}f'(x)$ exist


How can I execute a function on pressing the enter key in an  field?


Why can't I mine diamond, gold ore, or redstone ore?


What does the 'd' mean in ls -al results and what is that slot called?

Understanding UNIX permissions and file types


How do I find out which version and derivative of Ubuntu is right for my hardware in terms of minimal system requirements?


How to randomly pick half* of the item of a list with equity**?

Select N random elements from a List in C#


Points group automatically when adding delimited text layer


Strange javascript error when iterating over array

Why is using "for...in" for array iteration a bad idea?


integral of $\int_{0}^{1}\frac{\ln(x^{2}+1)}{x+1}dx$ using contour integration?


Existence of nontrivial automorphism for a group $G$ with $o(G)>2$

$|G|>2$ implies $G$ has non trivial automorphism


Is it ok to use Er. if a person is engineering degree holder

When is it appropriate to refer to someone as Dr. [Surname]?


Remove "Category Archives: title" at the top of a category page

Remove "Category:", "Tag:", "Author:" from the_archive_title


How to sample from a joint probability distribution of two variables?

How to generate numbers based on an arbitrary discrete distribution?


Will bounty rolled back if user removed or suspended?


How to filter months in chronological order?

How to correctly sort calendar months "mmm" with AutoFilter?


Is it possible to extend the C: drive to the left?

Extend Windows 7 partition to use free space before it


Android:What is the difference between ImageView and View?

Difference between View and ImageView when outputting an image


Ubuntu 18.10: visual artifacts (black bar) in dock if extend-height is disabled


How can I check if a class has operator<< defined for it?

Check if a class has a member function of a given signature


Should I use "is" or "are" when the subject is a list of percentages before a collective noun?

Does a percentage quantity take singular or plural verb agreement?


Need clarification on what lvm snapshots are and how they work


Can't select Operating System on dual-boot of Windows10 and Ubuntu

Can't boot into Ubuntu in Windows 10 / Ubuntu dual boot


Proof $a_{n+1} \geq a_n$ with $a_n := (1+1/n)^n$ for $n \in \mathbb{N}$

Show that $\left(1+\dfrac{1}{n}\right)^n$ is monotonically increasing


One word that conveys stability, unchanging terms, and word of honor in a local context


I saw her dance/dancing? I saw a flash of lightning strike/striking? I caught her steal/stealing?


Conditional Expected Value Problem involving Poisson and Gamma distributions

Poisson-Gamma mix conditional probability problem: Find the expected value of Λ for a policyholder having x accidents this year


Tips and resources for beginning designers


What is syntax highlighting and how does it work?


How to construct block matrix with shadowed entries?

vertical lines in matrix using tikz package


UnboundLocalError when variable is clearly local

UnboundLocalError: local variable 'url_request' referenced before assignment


How to get rid of a malware app "Chromes"?


PCA rotation and principal component scores

How to compute varimax-rotated principal components in R?


ssh possible dns spoofing when logging into multiple machines via single host

How to edit known_hosts when several hosts share the same IP and DNS name?


How to for loop iterate for two variables?


Write18: capturing shell (script) output as command/variable?


How to pretty print the name of a template parameter at compile time

Unmangling the result of std::type_info::name


how to publish sonar result in jenkins server, or do we have sonar-report jenkins plugin


How to convert a colored file to mail readable in bash?

Program that passes STDIN to STDOUT with color codes stripped?


Javascript object check if A included in B

How to determine equality for two JavaScript objects?


Binomial coefficient in closed form problem

Nested sum of binomial coefficient in closed form


Bad Headphone Connector Wiring Issues - What Could Be Wrong?

What is it that strips vocals from audio when a 1/8" audio jack is partially unplugged?


How did Harry break the Elder Wand in Deathly Hallows Part 2?


Can't create list custom settings (have they been deprecated?)


How can I solve the 100% disk usage issue in windows 8?

Windows 8 Pro clean install - everything slow; hard drive at constantly at 100%


How to find unknown correlation coefficients in a correlation matrix from known correlation coefficients?

How to infer correlations from correlations


What is the difference in meaning between "I play" and "I do play"?


Is there a keyboard shortcut to switch to a specific input source?


What is the use of type casting 'null' to any reference type in JAVA?


UK visa refused! Re-apply? Appeal? Or Judicial Review? What are my options

UK visa refusal on V 4.2 a + c (and sometimes 'e')


What is a NullPointerException, and how do I fix it?


Randomly select a proportion of files from a given directory


What macro techniques offer an alternative to expensive optics?


What is the correct way to pluralize an acronym / initialism?


Why are date-based hats awarded too early?


Firewall and virus software for Ubuntu 14.10

Is there a preinstalled or automatic firewall?


Why did the Wayne Enterprises corporate building change so radically?

Why was Gotham City changed from a mostly fictional city to New York City in the Nolan trilogy?


How can I find $\int \frac{1}{\sqrt{x^2 + x + 1}} dx$


Align h1 vertically and horizontally to body

Best way to center a  on a page vertically and horizontally?


Identifying a component symbol in a schematic

What is this electronics symbol (four triangles?)


Non-static method checkWriteStoragePermission() cannot be referenced from a static content

What is the reason behind "non-static method cannot be referenced from a static context"?


What do 1.#INF00, -1.#IND00 and -1.#IND mean?


Why is it dangerous for human being to touch one of contacts in AC wall outlet?

A question about earth ground and current loop


How to split a file according to a column (including header) and rename the generated files?


Infinite While Loop When InputMidmatchException is caught in try-catch block

try/catch with InputMismatchException creates infinite loop


Find $A \subseteq \mathbb{R}$ which is ishomorphic to $\omega^3$

Elementary Set Theory: Ordinals, Well Orderings and Isomorphisms


How do I get the SQLSRV extension to work with PHP, since MSSQL is deprecated?


Refresh data retrieved by a custom function in Google Sheet

Custom function won't refresh as inputs are changed


How do I recover my old Clash of Clans (COC) game save & base?


Methods to work around the problem of missing data in machine learning


Congruence with a power of 2 as exponent

Solving a congruence without Fermat's little theorem


Topology and geometry books for particle physicists

Book covering differential geometry and topology for physics


Working for Stack Exchange, who and how?


Can't boot without Flash Drive plugged in


Broad questions not deemed fit for Q&A format

How can I encourage Stack Overflow to rein in the 'subjective' vigilantes?


How to buffer balanced (XLR) audio signal while forwarding phantom power

XLR phantom power microphone mute, redux


Prove $\int ^{\pi/2}_0 \frac{\sin^m x}{\sin^m x+\cos^m x}dx=\frac{\pi}{4}$

Evaluate the integral $\int^{\frac{\pi}{2}}_0 \frac{\sin^3x}{\sin^3x+\cos^3x}\,\mathrm dx$.


If there exist sequence such that $g(x_n)=f(x_{n+1})$, then we have $g(x_0)=f(x_0)$ for some $x_0$


Why does this user-defined literal not work?


What is the exact chemical composition of human body?


Minkowski metric: Why does it look like it does?

Minkowski metric -- why does it follow from the constancy of the speed of light?


Why is the unit for capacitance so large?


Source of NullPointerException - Android

What is a NullPointerException, and how do I fix it?


Is it possible to get the "intermediate" Java code (or the syntax tree) before having been generated to bytecode

javac.exe AST programmatic access example


Why would you want to use a transformation function?

When (and why) should you take the log of a distribution (of numbers)?


Evaluating $\tan\left(\sum_{r=1}^{\infty} \arctan\left(\frac{4}{4r^2 +3}\right)\right)$


Any way to see mail sent by other user through shared address?


\newcommand{\name}{Name} to change a keyword in different versions


What is the difference between these two lines of code

What is the difference between new/delete and malloc/free?


Implementation file not being linked when compiling g++

Why can templates only be implemented in the header file?


finding an element in an array based on user input


Why doesn't height: 100% work to expand divs to the screen height?


Which was the comic where Steve Rogers was able to hold Thor's hammer?

Which MCU characters are shown to be worthy of Mjolnir in the comics?


java.lang.NullPointerException when reading from a text file


How to disable 'Use password for:' when typing in password field?

How do you disable browser autocomplete on web form field / input tags?


Dark theme not used by all applications - Ubuntu 18.04

Illogical GTK theme behaviour on Ubuntu 18.04


What are "sequence points" and how do they affect undefined behavior?


Short story with a man inside a time travel box being observed by scientists

Story about a time-traveler living backwards in a capsule


Bean is not recognizing the method by primefaces

p:commandButton action throws javax.el.PropertyNotFoundException


Intuitive explanation for formula of maximum length of a pipe moving around a corner?


Iterating over strings in list in python

Iterate a list as pair (current, next) in Python


defining 2 public classes in single java file error


Why & how disabled Google app(s) still keeps running something?


Mid-point convexity does not imply convexity

Example of a function such that $\varphi\left(\frac{x+y}{2}\right)\leq \frac{\varphi(x)+\varphi(y)}{2}$ but $\varphi$ is not convex


NullPointerException while parsing XML into hashmap JAVA

What is a NullPointerException, and how do I fix it?


How to add Leading Zero with getMonth in Java (Android)

How can I pad an integer with zeros on the left?


How to detect if *IIS user* has run the website in a Remote Desktop Connection

How to detect, from browser, if user is running in Remote Desktop session?


How to remove punctuation from a string/list

Best way to strip punctuation from a string


How to addError on the dynamic string field api name

Adding an error on a dynamic referenced field


Can the striker be dismissed, Caught, if the ball is deflected off an umpire?


Is the universe expanding or is it simply the matter within it spreading out further?


Using residues to calculate improper integral

Improper integration involving complex analytic arguments


Out of memory error when calling createBitmap

android - out of memory exception when creating bitmap


Can I visit other countries than the country issuing my visa during my trip to Europe?

Can I travel to Paris for a day with a single entry visa for Schengen from Switzerland?


Java Error - Illegal Modifier for Parameter - Only final Permitted


How do I pass dynamic number of lists to a varargs method?


Do I have to purchase java license to use Jenkins?

Can you help me with my software licensing issue?


Is a transit visa required for an Indian in a connecting flight via USA coming from Toronto?

Do I need a US visa to transit (or layover) through an American airport?


How to make grep return value without comma


What part of speech is the word "to" in "I left to get more snacks."?

What part of speech is the word 'to' used before verb infinitives?


What do these entries in my SSH logs mean?

How do I deal with a compromised server?


Can a Tunisian with a US A-2 visa visit Canada?

I have a US A-2 visa. Can I go to the Canadian side of Niagara Falls?


How to align the vertices of one object with the same vertices of another object?

How can I link the mesh data of several objects so they all use the same?


Java formatter in Eclipse - change java.lang.Object references to Object, add import statement as necessary

Automatically remove explicit package declarations with import statements in Java


Shell Script for logging into a ssh server


How to use orderby with 2 fields in linq?


E: Could not read response to hello message from hook [ ! -f /usr/bin/snap ] || /usr/bin/snap advise-snap --from-apt 2>/dev/null || true: Success

Error while installating pip for Python3


How to search for a String of numbers in a nested ArrayList?


Prove that $11,111,111.....$ is not a perfect square

Prove that none of $\{11, 111, 1111,\dots \}$ is the perfect square of an integer


I am unable to open corrupt MS Excel file due


How to upgrade my samsung galaxy ace plus GT -S7500 from Gingerbread to Jellybean


defining equation variables as a caption

How to write a perfect equation parameters description?


4-gon with two opposite sides congruent and two opposite angles congruent: necessarily a parallelogram?

If a quadrilateral has a pair of equal opposite sides, and a pair of equal opposite angles, then is it necessarily a parallelogram?


Proving that $n!≤((n+1)/2)^n$ by induction


Is there any filter option is available to see all duplicate questions in a SE site?


The message "Community♦ reviewed this ...: Approve" in suggested edits

Who runs "Community♦" on the review queue?


Does Ubuntu software center needs update ....?

Why don't the Ubuntu repositories have the latest versions of software?


Is personal pronoun followed with "verb+ing" grammatically correct?

Is "me trying to do [something]" grammatical?


How to remove the selected element during a clone() operation


FindRoot giving false roots with Bessel Functions

About multi-root search in Mathematica for transcendental equations


NullPointerException using fragment transactions

What is a NullPointerException, and how do I fix it?


Can I install Ubuntu 17.04 on a laptop Alienware 17 R3 without damage?

What are the system requirements for each flavour of Ubuntu Desktop?


How to modify existing, unpushed commit messages?


Fontconfig warning: "msfonts-rules.conf", line 23:


How does a JavaScript function store local variables after being called?


What does angle braces initializer "a[] = " means in C++? It gives out ouput as 1


What is the mean of negative sign in PCA?

Does the sign of scores or of loadings in PCA or FA have a meaning? May I reverse the sign?


Where does Delphi store the values of its environment variables?

How are Delphi 'environment variables' such as $(BDS) evaluated?


Does qunit-reporter-junit generate junit compatible xml?


Is there something or There is something?

Correctness of questions without inversion, relying on intonation


Can I fly from Kolkata to Imphal without any documents?

I have forgotten my ID proof and I'm doing an Indian domestic flight. Can I still fly?


Hiding browser address bar without reloading


When an app is moved to an external microSD card, to where is it moved?

When app is moved to SD card, where is the app data stored on SD card?


Unsetting array values in a foreach loop

How do you remove an array element in a foreach loop?


Store a value in an element outside of the matrix (as in Matlab)

Automatically growing lists as in MATLAB?


how to find best suited drivers for your system?

How to download all required Ubuntu drivers


"Will graduate" vs. "will be graduated" vs. "is going to graduate"


Convert String in Array form to String Array

Reverse (parse the output) of Arrays.toString(int[])


Does Coulomb's Law, with Gauss's Law, imply the existence of only three spatial dimensions?


My table doesn't fit; what are my options?


How much time does it take to translate a manga volume/tankobon?

Why does it take so long for the translated version of tankoubon volumes to be released?


JavaScript setTimeout can't access function variable

setTimeout in for-loop does not print consecutive values


Bower: "command not found" after installation


LNK2019 Error even though all files are added to project

Why can templates only be implemented in the header file?


How was the cameraman removed from the mirrors in the elevator scene?

How do they film the mirror scenes in movies?


java.lang.NullPointerException: Attempt to invoke virtual method 'int org.json.JSONArray.length()' on a null object reference How to fix it?

What is a NullPointerException, and how do I fix it?


How can I create entirely new data types with BibLaTeX/Biber?


what to do in case of command substitution on a linux server?

How do I deal with a compromised server?


Is returning a pointer to a static local variable safe?


Term for neologisms created to distinguish between new and old technologies

Is there a term for coining a phrase for a word that already exists?


How to cleanly pass many arguments in python and have default values?

What does ** (double star/asterisk) and * (star/asterisk) do for parameters?


What is the best way to remove accents (normalize) in a Python unicode string?


Bottom align element in Jumbotron Bootstrap

How can I position my div at the bottom of its container?


Getting Java To Recognise The Early Morning Hours In An If Statement Range

Why are integer literals with leading zeroes interpreted strangely?


Why can't I type simple formulas when using transforms?


For which $n\geq2$ does there exist $\sigma \in A_n$ with $|\sigma|>n$?

For which $n≥2$ does there exist $\sigma\in A_n$ with $|\sigma| > n$


How can I change the margins for only part of the text?


why there is less space in my external HDD than it supposed to have

Why are hard drives never as large as advertised?


How to upgrade from Java 7 to Java 8 on Amazon Linux

How can I upgrade to Java 1.8 on an Amazon Linux Server?


Can a maths undergraduate apply for a physics PhD?

Graduate school admission with a degree in a different field


Does the noun "structure" require an article in this case?

Are there any simple rules for choosing the definite vs. indefinite (vs. none) article?


Why is the same modal auxiliary, 'may/might' used to ask permission and for uncertainty?


Why a list is updated in a recursive call?

List of lists changes reflected across sublists unexpectedly


Why do I get undefined values in my array?

JavaScript "new Array(n)" and "Array.prototype.map" weirdness


Is there a special term for when a noun is used to describe another noun?


what is the advantage of declaring instance variable of collection (list, map) as final in java

Why would one mark local variables and method parameters as "final" in Java?


Find generator of multiplicative group of $\mathbb{F}_{27}$


Meta SE account is shown 3 times in accounts


How to find all the tables in MySQL with specific column names in them?


Will I clear customs in Honolulu or LAX?

When do I clear US customs and immigration if connecting at a US airport to my final destination elsewhere in the US?


LocalDateTime.isAfter() method in JSP - NullPointerException

What is a NullPointerException, and how do I fix it?


Make a div fill the height of the remaining screen space


How do I parse command line arguments in Bash?


Proof that $\gcd(ax+by,cx+dy)=\gcd(x,y)$ if $ad-bc= \pm 1$


Is there a simpler way of drawing relation maps?


Processing parameters with * passed to unix

Why does my shell script choke on whitespace or other special characters?


I can't figure out why my ref is displaying question marks instead of a figure number regarding a float

Why does an environment's label have to appear after the caption?


What is the Difference bw the Maximum CPU time on the Salesforce servers(10 second) and maximum execution time for each apex transaction (10 minute)

What exactly is execution time limit of 10 minutes?


Showing p-th sample quantile is asymptotically normal

Central limit theorem for sample medians


"In a party people shake hands with one another"


Why is the speed of light in vacuum constant?

How can I explain the scientific basis of the constant speed of light to a $c$-decay proponent?


How can I get a list of the monomials from a polynomial?

How to get a list of monomials of a polynomial without coefficients?


Problems with apt-get ppa from launch pad

How can I fix a 404 Error when using a PPA or updating my package lists?


How to group distinct values from a list using odata rest api


If $a$, $a+2$ and $a+4$ are prime numbers then, how can one prove that there is only one solution for $a$?

How can I prove that one of $n$, $n+2$, and $n+4$ must be divisible by three, for any $n\in\mathbb{N}$


"I am a degree holder now" or "I am now a degree holder"


How do I install a .deb file via the command line?


how to get the size of data type in python at run time?

How do I determine the size of an object in Python?


Simulating group_concat MySQL function in Microsoft SQL Server 2005?


Null Pointer Exception - Button in Android Fragment

What is a NullPointerException, and how do I fix it?


finding flaw in the bogus inductive proof

Questions on "All Horse are the Same Color" Proof by Complete Induction


How to get system cpu/ram usage in c++ on Windows

How to determine CPU and memory consumption from inside a process?


geoserver xml header for cors xmlhttprequest


How to /testfor snowball a snowball hitting the ground or mobs?

How can I trigger a command when a player is hit by a Snowball?


Euler characteristic, what is the precise relationship between $\chi(V)$, $\chi(V')$, and $\chi(V'')$?

Proof that the Euler characteristic is additive


Why does a cork float to the side of a glass?


ngAnimate not working while working with requirejs

Angular-animate - Unknown provider: $$asyncCallbackProvider <- $$asyncCallback <- $animate <- $compile


Does "Root A" follow the fact about Takatsuki and the One-Eyed Owl?


use for loop to add elements to an existing dictionary in a list

How do I merge two dictionaries in a single expression (taking union of dictionaries)?


Prove that every prime ideal of $R$ is maximal.

Show that any prime ideal from such a ring is maximal.


Is there any way to accept only numeric values in a JTextField?


Do I have to claim and re-check in my baggage in international transit when travelling with the same air line?


If the friction coefficients depend on the object's property, why do they change in sliding & rolling, despite the object being same?

Why are there both Static and Kinetic Friction?


Expected behaviour when adding items to your 'favourites'

Should the user be forced to sign in for a wish list on an ecommerce site?


Error writing /usr/share/phpmyadmin/libraries/sql.lib.php: Permission denied

'[Error writing /filename: Permission denied]' while trying to save a file using the nano editor


ls: show file size with thousand separator

Output ls -l size field with digits grouped by thousands?


Make f1-12 keys work as standard function keys on Macbook Pro 5,3

How do I activate Function Keys without pressing the fn button in the mac keyboard?


Weird artifacts when rendering on Nvidia GPU


Run app from removable drive without sudo

Is there a portable version of Chrome for Ubuntu?


The equivalent resistance betweeen A and B. I need the answer with proper explaination


Complete ring which is not integral domain

Complete local ring which is not complete valuation ring


What is the purpose of using pre-increment vs post-increment if return value is not used?

Difference between pre-increment and post-increment in a loop?


Create an application that will expire after a trial period

How to make a WPF application a 30 day trial version, and make it licensed using product key?


Is there a way to block installations of programs on Ubuntu?

Can I prevent/restrict standard users from installing/uninstalling software?


Error using MakeLowercase in section heading with hyperref package


Package listing errors due to Anbox while installing Katoolin

What can I do if a repository/PPA does not have a Release file?


Temperature behavior over time of black or white cars in hot, sunny regions


How to install IIS Express 8 and SQL Server 2012 using WiX?


Regex for up to 3 whole numbers and 2 decimals


how to charge 320 v capacitor with 9v battery

Generating high voltage (100V+) from 5V USB supply


Clarification needed on pots and pans in the dishwasher


Deﬁne a new addition ⊕ and multiplication on Z by a⊕b = a + b−1 and ab = a + b−ab.


HttpClient.GetAsync(...) never returns when using await/async


Edited tags showing same tag removal and addition

Diff shows tag being added and removed in the same revision


How is Captain America able to use Mjolnir to command lightning?


Which weapon do I draw by default when combat starts, if I have several weapons which I can wield?

Do you start combat with your weapon drawn when combat is not expected?


Resizing or expanding a CoreStorage volume


time of all guest session login in Ubuntu 14.04


Double Javascript Alert when ticking Community Wiki for self answer

“community wiki” checkbox in new question shows a dialog twice when self-answering


How to read a properties file in java in the original order

Pulling values from a Java Properties file in order?


error: file '/boot/grub/i386-pc/normal.mod' not found

error: file '/grub/i386-pc/normal.mod' not found


lim of integration of a non-negative function: $\lim\limits_{n\rightarrow\infty} \left[\int_a^b (f(x))^n \, dx\right]^\frac{1}{n} = M$

limit of Holder norms: $\sup\limits_{x\in [a,b]} f(x) = \lim\limits_{n\rightarrow\infty} \left(\int_a^b (f(x))^n \;dx\right)^{\frac{1}{n}}$


owl carousel not working after ajax load


How does the SO voter fraud detection mechanism work?


Command Line Tool for Adding To Your Windows PATH, Permanently?

Setting and getting Windows environment variables from the command prompt?


Hibernate: comparing current & previous record


Surjectivity of ${(\mathbb{Z}/m\mathbb{Z})}^{\times}\rightarrow {(\mathbb{Z}/n\mathbb{Z})}^{\times}$

Why $f\colon \mathbb{Z}_n^\times \to \mathbb{Z}_m^\times$ is surjective?


How to get rid of WARNING: PWC4011: Unable to set request character encoding to UTF-8


Is there any site that shows me what are older packages which are replaced by newer ones?

How to keep up with packages and know which ones are obsolete?


How to install OS X 10.7 and 10.8 in VMWare Fusion, on a 10.9 host?

How to re-download Lion to create a VMWare Fusion 4 virtual machine?


Is it true that $\forall n \in \Bbb{N} : (\sum_{i=1}^{n} a_{i} ) (\sum_{i=1}^{n} \frac{1}{a_{i}} ) \ge n^2$ , if all $a_{i}$ are positive?

Prove that $\left(\sum^n_{k=1}x_k\right)\left(\sum^n_{k=1}y_k\right)\geq n^2$


java.lang.ClassCastException: android.widget.LinearLayout cannot be cast to android.widget.TextView using ArrayAdapter

"ArrayAdapter requires the resource ID to be a TextView" XML problems


Title and tags do not show up while editing a moderator edited question


How to save picture to iPhone photo library?


The range of $T^*$ is the orthogonal complement of $\ker(T)$


How to Add an Object Literal to Another Object Literal in JavaScript

How can I merge properties of two JavaScript objects dynamically?


How to embed an inline script to an HTML page instead of a JavaScript file?


Extracting text within parenthesis in a QGIS attribute table


Is the ArcGIS Server JavaScript API free to use?


Operand Should Contain 1 Column - MySQL NOT IN


Fixed point of a map $\mathbb R^n \rightarrow \mathbb R^n$

Can a finite group act freely (as homeomorphisms) on $\mathbb R^n$


pros and cons of HSA in Investment account


NSUnknownKeyException - setValue: forUndefinedKey in classfile

Xcode - How to fix 'NSUnknownKeyException', reason: … this class is not key value coding-compliant for the key X" error?


calculator project app stopped while launching in phone

What is a NullPointerException, and how do I fix it?


Rigs available on the market for blender


Dock settings missing in gnome-control-center after upgrade to Ubuntu 17.10


Article 'the' use in front of television

"watching the television" or "watching television"?


Gives java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ArrayAdapter.clear()' on a null object reference


Why are many English contractions considered okay to use in contraction-form, but believed to "sound wrong" when used individually?

Why do not we ask negative questions without a contraction on the not after the verb?


Get and verify file names in a directory - Java


Identical float values comparing as inequal


cref refers to chapter instead of figure

Why does an environment's label have to appear after the caption?


Does this advertisement violate the ban on Fake UI ads?


In 2014 has any SEO value rewriting urls?

Are keywords in URLs good SEO or needlessly redundant?


How many permanent SPECIAL points are available in Fallout 4?


Resize Linux swap /Solaris and give main memory more space?


Why can't we introduce a symbol $j$ for $\frac{1}{0}$?

Why don't we define division by zero as an arbritrary constant such as $j$?


Is using a function to create an object in javascript as good as using the new operator


What is the correct word to describe something that’s not in the center of a container?

Math word for an object not centered at the origin?


Removing unnecessary whitespace in a J2EE/Struts Application in WebSphere


Grammatically, can you have a 'bit' of liquid?

Using 'a bit of water / wine ... ' vs 'a drop of water / wine' to describe a small quantity of liquid


Is there a Stack Exchange community in which one can ask subjective and possibly open-ended programming questions?

Give each site a parallel site for polling, recommendations and subjective-ish stuff


Best way to connect an android app to a remote database?

How to connect an android app to a remote database?


Any tips or tricks to hasten USB device detection and initialisation?


The \show command displays not all command

How do you peer into the definition of a robust command?


What does the * mean next to a filename in the ouput of the command ll?

What does the asterisk mean after a filename when you type `ls -l`?


When asking a question, could the page suggest relevant tags?

Automatically determine tags while writing a question


Value and size of an uninitialized std::string variable in c++