makecell conflicts with xcolor
new array.sty and colortbl.sty incompatibility?
Do I have a virus on my phone? A message from an Android app says so I have just received a message from an Android app on my phone saying my phone has been infected with a virus and to click a link to fix the problem.   I'm not sure I trust this, is it possible to have a virus on Android? Interscholastic Mathematics League Senior B Division #2 Points $P$, $Q$, $R$ and $S$ are chosen on the sides of parallelogram $ABCD$, so that $P$ is on line $AB$, $Q$ is on line $BC$, $R$ is on line $CD$, $S$ is on line $DA$, and $AP=BQ=CR=DS=\frac{1}{3}(AB)$. Compute the ratio of the area of $PQRS$ to the area of $ABCD$. I want to run Notepad++ twice. Like in this paint printscreen.  How I want it:    Not what I want:    Is this possible? Say that I have a vertical thermally insulated cylinder which contains an ideal monoatomic gas under a weightless piston and the system is initially in equilibrium.   Now if a load of weight $W$ is kept on the piston,the piston would fall by some distance and the system would attain a new equilibrium. It is intuitive that the sum of the work done by gravity and the work done by atmospheric pressure would change into internal energy of the gas.   However, my book mentions that only the work done by gravity goes into the increase in internal energy of gas. It does not say anything about where the atmospheric work would go. Why is it so? Run cmd.exe in Administrator mode without explorer.exe I've recently had trouble with explorer.exe not working.  I found a possible solution , using .  The problem is that I cannot "right-click Command Prompt, and then click Run as administrator", since explorer.exe does not work for even a second without crashing.  I tried to use the  to open cmd as administrator, but I get an error 1327 because I have a blank password.    My question is, is there any other way to run cmd.exe with admin privileges?  If not, is there any way to run sfc.exe without admin privileges?  If not, does anyone have solution to my original problem of explorer.exe stopping and restarting ad nauseam? Executing cmd.exe commands from Java 3D arrows with TikZ Asymptote does give 3D arrows when drawing three dimensional figures (they even have shade!). Could we fake it with TikZ? Here's an example, manually written, with just one arrow worked:  \documentclass{scrartcl} \usepackage{tikz} \usetikzlibrary{arrows.meta} \begin{document} \begin{tikzpicture}[-&gt;,scale=2]   \draw[&gt;={Triangle[width=3pt,length=5pt]}] (0,0,0) -- (1,0,0);   \draw[&gt;={Triangle[width=3pt,length=5pt]}] (0,0,0) -- (0,1,0);   \draw[&gt;={Circle[sep=-.9pt,width=3.08pt,length=2pt]Triangle[width=3pt,length=5pt]}] (0,0,0) -- (0,0,1); \end{tikzpicture} \end{document}     But that's (wrongly) manually calculated by trial and error (apart from the fact that it's not perfect, seeing how the other two axis —x and y— are oriented, it should have certain slant). It would be nice to have an interface like the other arrows  &gt;={3D[length=⟨real length⟩,width=⟨real width of the base⟩]}   Which would then calculate from those values (and, of course, also taking into account x=⟨x vect⟩,y=⟨y vect⟩,z=⟨z vect⟩)  Circle[sep=⟨value⟩,width=⟨value⟩,length=⟨value⟩,slant=⟨value⟩] Triangle[width=⟨value⟩,length=⟨value⟩] % And I'm not sure if `slant=⟨value⟩`                                        % is necessary in this Triangle case   Example  Using the code from the answer (thanks to Symbol1), for instance, this code (taking the idea from another question, link in the comments)  \begin{tikzpicture}[x={(0cm,1cm)},                     y={({cos(30)*1cm},{sin(30)*-1cm})},                     z={({cos(20)*1cm},{sin(20)*1cm})},                     thick,                     scale=3]   \pgfmathsetmacro{\ax}{.4}   \pgfmathsetmacro{\ay}{.6}   \pgfmathsetmacro{\az}{-.6}   \pgfmathsetmacro{\bx}{.4}   \pgfmathsetmacro{\by}{-.7}   \pgfmathsetmacro{\bz}{-.8}   \draw[densely dotted,thin] (\ax,\ay,\az) -- (\ax,0,\az);   \draw[densely dotted,thin] (\ax,\ay,\az) -- (0,\ay,\az);   \draw[densely dotted,thin] (\ax,0,0) -- (\ax,0,\az) -- (0,0,\az);   \draw[densely dotted,thin] (0,0,\az) -- (0,\ay,\az) -- (0,\ay,0);   \draw[densely dotted,thin] (\bx,\by,\bz) -- (\bx,0,\bz);   \draw[densely dotted,thin] (\bx,\by,\bz) -- (0,\by,\bz);   \draw[densely dotted,thin] (\bx,0,0) -- (\bx,0,\bz) -- (0,0,\bz);   \draw[densely dotted,thin] (0,0,\bz) -- (0,\by,\bz) -- (0,\by,0);   \draw[-{Cone3}] (0,0,0) -- (1,0,0) node[right] {$x$};   \draw[-{Cone3}] (0,0,0) -- (0,1,0) node[above right] {$y$};   \draw[-{Cone3}] (0,0,0) -- (0,0,1) node[below right] {$z$};   \draw[-{Cone3}] (0,0,0) -- (0,0,-1) node[above left] {$-z$};   \draw[thin] (0,0,0) -- (0,-.9,0);   \draw[-{Cone3}] (0,0,0) -- (\ax,\ay,\az) node[below left] {source};   \draw[-{Cone3}] (0,0,0) -- (\bx,\by,\bz) node[above right] {sim}; \end{tikzpicture}   gives this figure Proof a set cannot contain its own powerset - Russell's Paradox Using naive set theory and not using the cardinal number of a power set, how can you prove a set cannot contain its own power set? Is this connected to Russell's Paradox? Getting an "Authentication token manipulation" error when trying to change my user password I am logging in to my Ubuntu Server using my username. Once I am logged in I am typing passwd command. Entering a new password but a second after getting following error messages:  passwd: Authentication token manipulation error passwd: password unchanged   What is wrong here? How can I change my password otherwise if I don't have access to that server physically, i.e. I am connecting remotely with ssh using terminal. In Germany, crypto-currencies like Bitcoin are all over the news lately, making me aware of the fact I don't know much about them.  A journalistic TV program I was watching yesterday even claimed crypto-currencies are a real investment option... but I'm not so sure about that.  On one hand, I've been reading that across the ocean (USA and Canada), first ATMs have been setup that handle crypto-currencies.  On the other hand, I can not find any information if any crypto-currency is regulated (or even accepted) like common currencies (US dollar, Euro, Yen, etc.) are.  Can crypto-currencies really be regarded as a solid/conservative investment option like with regular currencies, or do I have to think of crypto-currencies like investing in "pork bellies" where risk tends to outrule chance, or are crypto-currencies more like fantasy-football and nothing one would/should seriously consider when it comes to planning an investment strategy?   Where exactly do I categorize crypto-currencies? How to open new tab in browser in selenium 3.0? I have tried multiple actions but it is not working.  It always close the first tab and then it open link in the same page.  // Driver is launched package WebBrowserCommands;  import org.openqa.selenium.By; import org.openqa.selenium.Keys; import org.openqa.selenium.WebDriver; import org.openqa.selenium.chrome.ChromeDriver; import org.openqa.selenium.interactions.Actions;  public class OpenBrowser   {     public static void main(String[] args) throws Exception {         System.setProperty("webdriver.chrome.driver","/Users/ss108/Desktop/Util/SELENIUM SUPPORT/chromedriver");          WebDriver driver = new ChromeDriver();          driver.manage().window().maximize();         // Driver is launched          //We have two ways         boolean Indriectway = true;         //Boolean to understand both method          if(!Indriectway){             //Using String to take value.             String URL = "https://www.google.com";             driver.get(URL);              String PageSourceFirst = driver.getPageSource();             //We have took title in PageSourceFirst             System.out.println(PageSourceFirst);              //Get Title Command             String TitleFrist = driver.getTitle();             //We have took title in TitleFirst             System.out.println("Tile of WebSite is " + TitleFrist);              //Get Current URL             String CurrentURLFirst = driver.getCurrentUrl();             System.out.println("Current URL is " + CurrentURLFirst);              Actions act=new Actions(driver);             act.contextClick(driver.findElement(By.linkText("Gmail"))).perform();             Thread.sleep(10000);             act.contextClick(driver.findElement(By.linkText("Gmail"))).sendKeys(Keys.ARROW_DOWN).sendKeys(Keys.RETURN).build().perform();                    // Try to open page using right click and action arrow down **but it is not working**              driver.close();          }else {             //Using directly             driver.get("https://www.facebook.com");             String PageSourceSecond = driver.getPageSource();             System.out.println(PageSourceSecond);              //Get Title Command             System.out.println("Tile of WebSite is " + driver.getTitle());             //Get Current URL             System.out.println("Current URL is " + driver.getCurrentUrl());             driver.quit();          }     } }   Second method  1- Same result getting   System.setProperty("webdriver.chrome.driver","/Users/ss108/Desktop/Util/SELENIUM SUPPORT/chromedriver");     WebDriver driver = new ChromeDriver();     driver.get("https://www.facebook.com")     Robot robot = new Robot();     robot.keyPress(KeyEvent.VK_META);     robot.keyPress(KeyEvent.VK_T);     robot.keyRelease(KeyEvent.VK_T);     robot.keyRelease(KeyEvent.VK_META);       driver.get("https://www.google.com")   Third method  String selectLinkOpeninNewTab = Keys.chord(Keys.CONTROL,Keys.RETURN);  driver.findElement(By.linkText("urlLink")).sendKeys(selectLinkOpeninNewTab);   however none of them work for what I am trying. Did any Quidditch games ever end by agreement of the Captains? The game can only end when the Snitch has been caught, or by mutual agreement of the two teams' Captains; the latter is very rare, however, as one team would have to lose. (source: HP Wikia on Golden Snitch)   Is there an example from canon of this resolution to the game ever happening? I've been at this for almost two hours and no one seems to have the same problem as I and I doubt this will be solved but I'll try anyway.  this is the code  /tellraw @p ["Would you like to teleport?",{"text":"Yes","color":"green","bold":"true","clickEvent":{"action":"run_command","value":"/tp @p ~ ~4 ~ "},"hoverEvent":{"action":"show_text","value":{"text":"Confirm"}},{"text":"No","color":"red","bold":"true","clickEvent":{"action":"run_command","value":"/tellraw @p{"text":"Come back when you want to teleport"}"}}}]   this part is fine  /tellraw @p ["Would you like to teleport?",{"text":"Yes","color":"green","bold":"true","clickEvent":{"action":"run_command","value":"/tp @p ~ ~4 ~ "},"hoverEvent":{"action":"show_text","value":{"text":"Confirm"}}   it's just when I add this  ,{"text":"No","color":"red","bold":"true","clickEvent":{"action":"run_command","value":"/tellraw @p{"text":"Come back when you want to teleport"}"}}}]   Minecraft gives me the error:     Invalid JSON at line 1 column 203   I've tried to space it out and figure out what column 203 is but I can't, I don't know what I did. Anyone got any ideas? If $X,Y$ are equivalence relations, so is $X \times Y$ I have created the custom setting with the hierarchy type    I have added some fields to the custom settings  phone field is added to the custom settings  custom setting Name:Order_Configuration__c  Phone :12345 - one profile  phone:456798 - another profile   Is it possible to access the different values for different profiles in custom settings using apex trigger code Why is my variable local in one 'while read' loop, but not in another seemingly similar loop? Why do I get different values for $x from the snippets below?  #!/bin/bash  x=1 echo fred &gt; junk ; while read var ; do x=55 ; done &lt; junk echo x=$x  #    x=55 .. I'd expect this result  x=1 cat junk | while read var ; do x=55 ; done echo x=$x  #    x=1 .. but why?  x=1 echo fred | while read var ; do x=55 ; done echo x=$x  #    x=1  .. but why? Now, that Ubuntu 17.10 is out, and Unity 7 is replaced with Gnome 3, is there a way to install and use Unity7?   I know Unity is still in the repositories, so it should be possible, right? Windows Media Player 12 shows wrong cover art when playing Definite article before name of languages Should I use the definite article before name of languages?   (the?) Persian language (the?) German language (the?) Arabic language (the?) Russian language (the?) English language   Some language name may also refer to other things, so you need language word after their name. If 20 independent Bernoulli trials are carried out each with a different probability of success and therefore failure. What is the probability that exactly n of the 20 trials was successful?  Is there a better way of calculating these probabilities rather than simply summing together the combinations of success and failure probabilities?