Will it ever be the year 2000 in The Matrix?
How does time work in The Matrix?
What does 'condescending' exactly mean? I'm really confused about the meaning of the word 'condescending'. Online dictionaries define it as bossy/disdainful, which fits with...    But I find other usages where being condescending is obviously considered a good thing, perhaps more like being humble, or equal, rather than superior...    (and  of "condescending and friendly" in Google Books)  What's going on? Does this word really have two almost opposite meanings? Any way to send a personal message to another user? If $$S=\frac{1}{1+1^2+1^4}+\frac{2}{1+2^2+2^4}+\cdots+\frac{n}{1+n^2+n^4}\,$$ find the value of $14S$.  The question can be simplified to:  Find $S=\sum\limits_{k=1}^n\,t_k$ if $t_n=\dfrac{n}{1+n^2+n^4}$.  As $1+n^2+n^4$ forms a GP, $$t_n=\frac{n(n^2-1)}{n^6-1}\,.$$ But I can't figure out how to solve further. It would be great if someone could help. Bootstrap with Salesforce I am trying to create a simple page using Bootstrap within salesforce. I need this page to have the standard salesforce header and sidebar.  When I use the standard bootstrap library via a CDN and the page is affecting all the CSS styling for my standard salesforce headers and side bars. Any help on how to prevent this ? Why $SU(3)$ and not $U(3)$? error tex capacity exceeded log files added I am having a hard time figuring out where the problem is with my code/workflow. I previously posted this question , but then the same problem came straight back. When I run it in tex, I get an error input limit exceeded. The exact log is pasted below:  This is pdfTeX, Version 3.14159265-2.6-1.40.17 (MiKTeX 2.9.6210 64-bit) (preloaded format=pdflatex 2017.1.26)  26 JAN 2017 20:45 entering extended mode **./master.tex (master.tex LaTeX2e &lt;2016/03/31&gt; patch level 3 Babel &lt;3.9r&gt; and hyphenation patterns for 75 language(s) loaded. ("C:\Program Files\MiKTeX 2.9\tex\latex\base\article.cls" Document Class: article 2014/09/29 v1.4h Standard LaTeX document class ("C:\Program Files\MiKTeX 2.9\tex\latex\base\size11.clo" File: size11.clo 2014/09/29 v1.4h Standard LaTeX file (size option) ) \c@part=\count79 \c@section=\count80 \c@subsection=\count81 \c@subsubsection=\count82 \c@paragraph=\count83 \c@subparagraph=\count84 \c@figure=\count85 \c@table=\count86 \abovecaptionskip=\skip41 \belowcaptionskip=\skip42 \bibindent=\dimen102 ) ("C:\Program Files\MiKTeX 2.9\tex\latex\apacite\apacite.sty" Package: apacite 2013/07/21 v6.03 APA citation \c@BibCnt=\count87 \bibleftmargin=\skip43 \bibindent=\skip44 \bibparsep=\skip45 \bibitemsep=\skip46 \biblabelsep=\skip47 ) No file master.aux. \openout1 = `master.aux'.  LaTeX Font Info:    Checking defaults for OML/cmm/m/it on input line 5. LaTeX Font Info:    ... okay on input line 5. LaTeX Font Info:    Checking defaults for T1/cmr/m/n on input line 5. LaTeX Font Info:    ... okay on input line 5. LaTeX Font Info:    Checking defaults for OT1/cmr/m/n on input line 5. LaTeX Font Info:    ... okay on input line 5. LaTeX Font Info:    Checking defaults for OMS/cmsy/m/n on input line 5. LaTeX Font Info:    ... okay on input line 5. LaTeX Font Info:    Checking defaults for OMX/cmex/m/n on input line 5. LaTeX Font Info:    ... okay on input line 5. LaTeX Font Info:    Checking defaults for U/cmr/m/n on input line 5. LaTeX Font Info:    ... okay on input line 5. \c@maskedRefs=\count88 ("C:\Program Files\MiKTeX 2.9\tex\latex\apacite\english.apc" File: english.apc 2013/07/21 v6.03 apacite language file LaTeX Info: Redefining \BPBI on input line 129. LaTeX Info: Redefining \BHBI on input line 130. ) ! TeX capacity exceeded, sorry [input stack size=5000]. \AtBeginDocument #1-&gt;#1  l.5 \begin{document}  If you really absolutely need more capacity, you can ask a wizard to enlarge me.   Here is how much of TeX's memory you used:  641 strings out of 493333  7639 string characters out of 3139188  74825 words of memory out of 3000000  4254 multiletter control sequences out of 15000+200000  3940 words of font info for 15 fonts, out of 3000000 for 9000  1141 hyphenation exceptions out of 8191  5000i,0n,4998p,136b,36s stack positions out of 5000i,500n,10000p,200000b,50000s !  ==&gt; Fatal error occurred, no output PDF file produced!   I previously posted this question and thought I solved it but am having the same problem again.   The latex code I am trying to execute is below:   \documentclass[11pt,twoside]{article} \usepackage{apacite} \nocite{*}  \begin{document}   % title page. Edit as needed for future publications.  \title{Research Proposal} \author{Teererai Marange \\ Department of Computer Science \\ University of Auckland\\ \texttt{t.marange@auckland.ac.nz}} \date{January 26, 2017} \maketitle % end title page.    % abstract goes here \newpage \begin{abstract} Abstract goes here  \end{abstract} \newpage   % table of contents  \tableofcontents \newpage   %begin introduction  \section {Introduction} Lorem Ipsum Doremifaso   %\cite{Nedakeyword} use to cite     %references our biliography. This must go whereever we use our bibtex references  \bibliography{references} \bibliographystyle{apacite}   \end{document}   and the bib file that I am using to build the bibliography is below:   @misc{wikipedia1,   title = "Scripting language",   author = "Wikipedia",   url = {http://en.wikipedia.org/wiki/Scripting_language},   year = 2014, } Labeling Multiple Equations Per Row of a Table I am trying to create a table with two columns of independently labelled equations (1-6). Unfortunately, everything I have found so far either has not worked or would number them as sub-equations (1a, 1b, etc).  My current attempt is:  \documentclass{article} \usepackage{graphicx, verbatim, tabularx} \usepackage{amsfonts} \usepackage{amsmath, amssymb}  \newcommand{\grad}{\vec{\nabla}}       \newcommand{\prtl}[2]{\frac{\partial #1}{\partial #2}}  \newcommand{\curl}{\grad\times} \begin{document}  \begin{tabular}{p{5cm}p{5cm}}  $\curl\vec{E} = -i\omega\mu\vec{H}$ &amp;   $\curl\vec{H} = i\omega\mu\vec{E}$ \\  \begin{equation}  \label{eq:curlHx}   \prtl{E_z}{y} +\gamma E_y= -i\omega\mu H_x  \end{equation}  &amp;  \begin{equation}  \label{eq:curlEx}    \prtl{H_z}{y} +\gamma H_y= i\omega\mu E_x  \end{equation}\\  \begin{equation}  \label{eq:curlHy}    -\prtl{E_z}{x} -\gamma E_x= -i\omega\mu H_y  \end{equation}  &amp;  \begin{equation}  \label{eq:curlEy}    -\prtl{H_z}{x} -\gamma H_x= -i\omega\mu E_y  \end{equation}  \\  \begin{equation}  \label{eq:curlHz}   \prtl{E_y}{x}-\prtl{E_x}{y} = -i\omega\mu H_z  \end{equation}  &amp;  \begin{equation}  \label{eq:curlEz}    \prtl{H_y}{x}-\prtl{H_x}{y} = -i\omega\mu E_z  \end{equation}  \end{tabular}  \end{document}   Is there an environment other than tabular that would make this work? Tabularx came close (got the numbering correct), but the formatting/spacing was horrific. Trying to identify a science fiction short story from an anthology likely published before 1991.  Aliens invade during a nuclear war (which would be World War III, WWIII, WW3). The warring nations then turn their nukes on the landing sites, but the invasion succeeds.  Believe the setting is in the U.S., possibly Pacific Northwest, but definitely a mountainous region.  Based on negative inference from the aliens' description of humans as fur-less, no-tail, bipeds (or similar), the aliens are apes or monkeys.  The aliens describe Earth as worse than the Hell planet they previously conquered. They see our tanks and think that we can't have more than a few of those to fight with.  Yet the aliens are somewhat benign, as they take some children back to their parents for a stern talking-to after the children run an alien convoy off the road into a chasm by stringing a rope across the road. How to make a bib entry appear also in the main document I have a reference which has a bib entry and appears in the bibliography. I want to be able to include the entire entry, exactly as it appears in the bibliography, somewhere else in the document.   Is there any way to do that other than to manually write it and format it to look similar? Delete specific line number(s) from a text file using sed? I want to delete one or more specific line numbers from a file. How would I do this using sed? Does there exist an $a_0$ such that the sequence $a_{n+1} = 2a_n + 1$ is prime for all $n \ge 0$? I believe I see that $a_n = 2^n(a_0+1) - 1$ but am somewhat uncertain where to proceed afterwards. I am a complete beginner at number theory and would appreciate it if someone could point me in the right direction--surely there is some obvious argument I am missing. I've fitted my model and am trying to understand whether it's any good. I've calculated the recommended metrics to assess it ($R^2$/ AUC / accuracy / prediction error / etc) but do not know how to interpret them. In short, how do I tell if my model is any good based on the metric? Is an $R^2$ of 0.6 (for example) sufficient to let me proceed to draw inferences or base scientific/business decisions?     This question is intentionally broad, to cover a wide variety of situations that members frequently encounter; such questions could be closed as duplicates of this one. Edits to broaden the scope beyond the metrics mentioned here are welcome, as are additional answers - particularly those that offer insight about other classes of metrics. In Chipaca's answer to  there's a screenshot with certain highlights. The highlights are the following:   A row of a GUI list is highlighted by the other parts of the screenshot being darker. A check mark is highlighted by being circled by what looks like a (orange) crayon.   How do I create both of these highlights on a screenshot? Is there an automated process?  The screenshot I'm referring to looks like this: Can I travel to Canada with valid visa on old/expired passport? Excluding empty(Null) fields when using EntityFieldQuery query condition Can space expand with unlimited speed? just after the Big Bang and before inflation the currently observable universe was the size of a coin. One millionth of a second later the universe was the size of the Solar System, which is an expansion much much faster than speed of light. Can space expand with unlimited speed? How to downgrade a package via apt-get? How can I downgrade a package to an older version via apt-get?  Other tools are also acceptable but apt-get is preferred. My friend and i would like to translate Ubuntu. where should we start? where to find translation tools? How can I get ssh-agent working over ssh and in tmux (on OS X)? I have a private key set up for my github account, the passphrase to which is, I believe, stored in OS X's keychain. I certainly don't have to type it in when I open a terminal window and enter ssh git@github.com.  However, when I'm running bash over an ssh session, or locally inside a tmux session, I have to type in the passphrase every single time I attempt to ssh to github.   suggests that a similar problem exists with screen, but I don't really understand the issue well enough to fix it in tmux. There's also  which includes a fairly complicated solution, but for zsh.  EDIT:  In response to , from a local terminal I get the following output:  [~] $ echo $SSH_AUTH_SOCK /tmp/launch-S4HBD6/Listeners [~]  $ ssh-add -l 2048 [my key fingerprint] /Users/richie/.ssh/id_rsa (RSA) [~] $ typeset -p SSH_AUTH_SOCK declare -x SSH_AUTH_SOCK="/tmp/launch-S4HBD6/Listeners"   Whereas over ssh or in tmux I get:  [~] $ echo $SSH_AUTH_SOCK  [~] $ ssh-add -l Could not open a connection to your authentication agent. [~] $ typeset -p SSH_AUTH_SOCK bash: typeset: SSH_AUTH_SOCK: not found   echo $SSH_AGENT_PID returns nothing whatever shell I run it from. Is there a rule in British English about how to pronounce "either"?