Is possible for grep, or egrep to see the exact word? See this example: those are my groups groups floppy audio video cdrom games plugdev power netdev scanner users  I want to see only power, but return the entire line groups |grep --color -w power floppy audio video cdrom games plugdev power netdev scanner users  Is easy to return only power using pipe with awk or cut groups |grep --color -w power|cut -d ' ' -f 9 power  but my question is: is possible for grep or egrep command to return the exact word only?
I'm entering the world of Linux and at work I'm using grep more and more.  By doing that I'm figuring out that sometimes it's not adequate for what I want.  I was struggling with grep a few days ago and a colleague of mine who is a senior Linux admin, told me to use awk. I was stunned by how fast I got a result.  So my question is when do you choose to use one over the other? What questions can I ask myself before going to work with grep and spending a lot of time, when I could have done it with awk and saved time?
Pairwise independence of Random variables does not imply indendence Show by a counterexample that for a family $(X_i)_{i\in I}$ of random variables the independence of all pairs $(X_i,X_j)$ with $i,j\in I, i\neq j$ does not imply the independence of the family (It is enough to consider $\mbox{card}(I)=3$.).      Hello, I am searching for a simple example. The professor gave the hint that one might consider random variables which only can take two different values, but I do not know exactly what is meant.  By the way:  We call the family $(X_i)_{i\in I}$ of random variables independent, if $(\sigma(X_i))_{i\in I}$ is independent, whereat we call a family $(\mathcal{E}_i)_{i\in I}$ with $\mathcal{E}_i\subset\mathcal{A}$ independent, if for any finite subset $I_0\subset I$ and any choice $E_i\in\mathcal{E}_i, i\in I_0$, it is $$ \mathbb{P}(\bigcap_{i\in I_0}E_i)=\prod_{i\in I_0}\mathbb{P}(E_i). $$ I wanted to create an account for Ubuntu One, but I got impatient when the email with the verification code didn't arrive... I thought I might have typed the wrong address, closed the window and tried again. it told me the address already existed and I just got the code. But since I closed the window I missed it. Is there any way to recover the code? 7 segment binary to hex Opening website external links in new window -- published usability tests Continuous function on R which tends to infinity on open interval must have a minimum Suppose we have $f : \mathbb{R} \to \mathbb{R}$ continuous and $$\lim\limits_{x \to \pm \infty} f(x) = \infty.$$  Then must $f$ have a minimum on $\mathbb{R}$?  Intuitively it seems so, and it's easy to prove for some arbitrary closed interval in $\mathbb{R}$ with the Extreme Value Theorem, but how can we apply that to an open interval like $(-\infty, \infty)$? If $\gcd(a,b)=1$, $\gcd(a,y)=1$ and $\gcd(b,x)=1$ then prove that $ax+by$ is prime to $ab$.  I tried assuming Diophantine Equations for all the relations and representing everything in terms of $a$, but that didn't lead me anywhere. There must be an intuitive and elegant approach right? Evaluating the limit $\lim_{n\to\infty} \left[ \frac{n}{n^2+1}+ \frac{n}{n^2+2^2} + \ldots + \frac{n}{n^2+n^2} \right]$ Evaluating the limit $\displaystyle \lim_{n\to\infty} \left[  \frac{n}{n^2+1}+ \frac{n}{n^2+2^2} + \ldots + \frac{n}{n^2+n^2} \right]$  I have a question about the following solution:  We may write it in the form:  $$ \frac{1}{n} \left[ \frac{1}{1+(\frac{1}{n})^2} + \ldots + \frac{1}{1+(\frac{n}{n})^2} \right] $$  Somehow I need to figure out that the limit is actually the Riemann sum of $\frac{1}{1 + x^2}$ on $[0,1]$ for $\pi = 0 &lt; \frac{1}{n} &lt; \ldots &lt; \frac{n}{n}$.  Can you explain to me to reach this conclusion? Which statistical test to analyse? I am trying to find out how inflammatory markers change in response to a mechanical device change. I have daily readings for the 5 days before the event and for the 5 days after the event. I am expecting a rise in inflammatory markers in the pre readings followed by a fall after the device change. I also need to find out how the change differs in two subgroups (sample sizes of the subgroups are n=21 and n=88). The aim is to find out if the change is significant, to consider these markers as predictors of the device failing and hence needing to be changed.    I would like to know what test would be appropriate to analyse this. I need to keep things simple as I and the people reading the results are non-statisticians. Unable to Enter a Country If I have a connecting flight through a country I am unable to enter. Can I retrieve my bags to recheck for my connect? I am supposed to integrate $f(z)=$$\frac{5}{z}$ from -3 t0 3 but I am having trouble understanding how to do this. I've done the integration the "hard" way by using parametrizations but now I need to use the fact that $f(z)$ is analytic everywhere except at $z=0$ and a different method to perform the integration but I am stumped. Is a Schengen visa/transit visa required for a transit flight through two Schengen airports? What is the autocorrelation for a random walk? Seems like it is really high, but this is counterintuitive to me. Can somebody please explain? I am very confused by this issue and would appreciate a detailed, insightful explanation. Thanks a lot in advance! Long-distance movement arrow in gloss I have a question on drawing an arrow using gb4e. Currently, I am trying to use the method described in the link below. The problem takes place when I draw the long distance arrow like (5). As you can see the picture below, the line cross over the gloss. I would like to draw the horizontal line like the example (1). How can I evacuate the crossing?    \documentclass[11pt, dvipdfmx]{article} \usepackage{tikz} \usetikzlibrary{calc} \newcommand\tikzmark[1]{\tikz[remember picture, baseline=(#1.base)] \node[anchor=base,inner sep=0pt, outer sep=0pt] (#1) {#1};}  % This code from http://tex.stackexchange.com/q/55068/2693 \tikzset{     ncbar angle/.initial=90,     ncbar/.style={         to path=(\tikztostart)         -- ($(\tikztostart)!#1!\pgfkeysvalueof{/tikz/ncbar angle}:(\tikztotarget)$)         -- ($(\tikztotarget)!($(\tikztostart)!#1!\pgfkeysvalueof{/tikz/ncbar angle}:(\tikztotarget)$)!\pgfkeysvalueof{/tikz/ncbar angle}:(\tikztostart)$)         -- (\tikztotarget)     },     ncbar/.default=0.5cm, }  % Thanks to Paul Gessler adn Percusse for code improvement here \newcommand{\arrow}[2]{\begin{tikzpicture}[remember picture,overlay] \draw[-&gt;,shorten &gt;=3pt,shorten &lt;=3pt] (#1.base) to [ncbar=\arrowht] (#2.base); \end{tikzpicture} \setlength{\arrowht}{0ex} } \usepackage{gb4e} % The following code modified from  % http://permalink.gmane.org/gmane.comp.tex.linguistics/1036 % This adds some extra space after the first line \newlength{\arrowht} \setlength{\arrowht}{0ex} \newcommand*\cgdepthstrut{{\vrule height 0pt depth \arrowht width 0pt}} \renewcommand\eachwordone{\cgdepthstrut\rmfamily} \renewcommand\glt{\vskip -\topsep} \let\trans=\glt \newcommand\arrowex{\setlength{\arrowht}{2.5ex}\ex}   \begin{document} \begin{exe} \ex\label{scramble-det} \begin{xlist}         \arrowex          \gll          \ldots dat Jan \tikzmark{een} auto gisteren \tikzmark{t}  gekregen heeft.\\         \ldots that John a car  yesterday t gotten has \\         \ldots that John a car yesterday.         \arrow{t}{een} \end{xlist} \end{exe}  \begin{exe} \ex\label{scramble-dets} \begin{xlist}         \ex          \gll          \ldots dat Jan een auto gisteren t gekregen heeft.\\         \ldots that John a car  yesterday t gotten has \\         \ldots that John a car yesterday. \end{xlist} \end{exe}  \begin{exe} \ex[]{     \gll     John-wa totetumonaiukurai baka-da.    \\     John-Top very stupid-cop \\     `John is very studip.'     }  \ex[]{     \gll     John-wa totetumonaiukurai dousiyoumonai tondemonai sukuigatai baka-da.    \\     John-Top very very very very stupid-cop \\     `John is very studip.'     }  \arrowex[]{     \gll     \tikzmark{John}-wa totetumonaiukurai dousiyoumonai tondemonai sukuigatai  \tikzmark{t} baka-da.    \\     John-Top very very very very stupid-cop \\     `John is very stupid.'         \arrow{t}{John} }  \end{exe}  \end{document} Standard Visitor visa refusal (Deception, V3.6(b)) and procedure for reapplying My mother acquired a criminal record in UK in 2010 when she was given a conditional discharge for 12 months and charged £85. This time while applying the on-line applications for her, I accidentally missed the criminal records column and replied "NO". The visa was refused with appeal and administrative review not allowed.  Can someone please suggest my next course of action for reapplying for a visa  It is an extremely urgent family matter, and I want the visa as early as possible. While researching I found in a blog some mention of a forwarding letter while reapplying.  Can someone please enlighten me on the entire issue? Customizing titlesec-etoc (further question) Another simple series convergence question: $\sum\limits_{n=3}^\infty \frac1{n (\ln n)\ln(\ln n)}$ I'm being asked to determine if $\displaystyle\sum\limits_{n=3}^\infty \frac1{n (\ln n)\ln(\ln n)}$ converges. So, using Cauchy's Condensation Test, I reduced the problem to one of determining the convergence of $\displaystyle\sum\limits_{n=3}^\infty\frac 1{n\ln (n\ln 2)}$. Am I on the right path, and how do I proceed from here? Inkscape filters are not rendering correctly I'm running Inkscape 0.92.4 on Ubuntu Linux 19.10. My graphics driver is from NVidia. I'm given to believe that Inkscape's filters should work and render fairly similarly to how filters work in GIMP. My expectations are based on this image which shows various filter effects which ship with Inkscape:    However, when I apply filters to even very simple shapes, I get horrible pixelated garbage like this:      Can anyone help me understand what is wrong and how to correct it? Thanks! What is average distance from center of square to some point? First, I'll state some background that lead me to the question.  I was thinking about quantization of space-time on and off for a long time but I never really looked into it any deeper (mainly because I am not yet quite fluent in string theory). But the recent discussion about  got me thinking about the topic again. Combined with the fact that it has been more or less decided that , I decided I should give it a go.    So, first some of my (certainly very naive) thoughts.  It's no problem to quantize gravitational waves on a curved background. They don't differ much from any other particles we know. But what if we want the background itself to change in response to movement of the matter and quantize these processes? Then I would imagine that space-time itself is built from tiny particles (call them space-timeons) that interact by means of exchanging gravitons. I drawed this conclusion from an analogy with how solid matter is built from atoms in a lattice and interact by means of exchanging phonons.  Now, I am aware that the above picture is completely naive but I think it must in some sense also be correct. That is, if there exists any reasonable notion of quantum gravity, it has to look something like that (at least on the level of QFT).  So, having come this far I decided I should not stop. So let's move one step further and assume string theory is correct description of the nature. Then all the particles above are actually strings. So I decided that space-time must probably arise as condensation of huge number of strings. Now does this make any sense at all? To make it more precise (and also to ask something in case it doesn't make a sense), I have two questions:        In what way does the classical space-time arise as a limit in the string theory? Try to give a clear, conceptual description of this process. I don't mind some equations, but I want mainly ideas.   Is there a good introduction into this subject? If so, what is it? If not, where else can I learn about this stuff?      Regarding 2., I would prefer something not too advanced. But to give you an idea of what kind of literature might be appropriate for my level: I already now something about classical strings, how to quantize them (in different quantization schemes) and some bits about the role of CFT on the worldsheets. Also I have a qualitative overview of different types of string theories and also a little quantitative knowledge about moduli spaces of Calabi-Yau manifolds and their properties. Adding Facebook Online Account - "application you are trying to use doesn't exist or has been disabled"