Wireless option missing in network settings
How do I get a Ralink RT3290 wireless card working?
What is the proper way to extend the Fibonacci numbers to negative numbers? I have a feeling this question is a duplicate, but it's not coming up in "Questions that may already have your answer."  We all know very well that $F(0) = 0$, $F(1) = 1$ and $F(n) = F(n - 2) + F(n - 1)$ for all $n &gt; 1$.  I'm wondering about $n &lt; 0$. My first thought was $F(-n) = -F(n)$, which is appealing from a multiplicative point of view, as it seems to preserve certain identities, like $F(n)^2 = F(n - 1) F(n + 1) - (-1)^n$.  But it doesn't quite make sense from an additive point of view, it doesn't seem to work both "forwards" and "backwards." For example, it would give us $F(-1) + F(0) = -1 \neq F(1)$.  How do we extend $F(n)$ to negative $n$ so as to maintain both the related identities and the basic defining identity? Is the following scheme for generating $p_n=(1/3)^n$ stable or not. $p_n=(5/6)p_{n-1}-(1/6)p_{n-2}$. Can I cross the USA-Canada border with a birth certificate and a passport locator number? My US passport took too long to be shipped to me, and it will arrive after I need to leave. Will I be able to cross the border from the United States to Canada with a birth certificate (copy) and a passport locator number? I'm one of those exceptions that deviates from the norm: I run CyanogenMod without any Google apps.   Is it possible to download the Stack Exchange Android app .apk directly? Hiding sublayer with toggle button using LayerActions? I have a toggle map (like ) with sublayers. I want all the sublayers to be visible when you open the map, but I would like to hide some sublayers when the toggle buttons are clicked. I've tried adding a hide sublayer code into the LayerActions section of my code, but it's not hiding the sublayers (the button does the same function no matter whether the 'layer.getSubLayer(1).hide()' is there or not). This is the code I'm using:  var LayerActions = {  all: function(){   layer.getSubLayer(1).hide();   sublayers[0].setSQL("SELECT * FROM spreadsheet");   return true;  },  2011: function(){   layer.getSubLayer(1).hide();   sublayers[0].setSQL("SELECT * FROM spreadsheet WHERE year IN ('2011') AND year IS NOT NULL");   return true;  },  2012: function(){   layer.getSubLayer(1).hide();   sublayers[0].setSQL("SELECT * FROM spreadsheet WHERE year IN ('2012', '2012/2013') AND year IS NOT NULL");   return true;  } }   $('.button').click(function() {  $('.button').removeClass('selected');  $(this).addClass('selected');  LayerActions[$(this).attr('id')](); });   Could someone point me to where I'm messing up with my code? Or is it not possible to hide a sublayer using the LayerActions?    I'm now loading my layers differently, and this is my new code:   cartodb.createLayer(map, url1)     .addTo(map, 0)     .done(function (layer) {         console.log('added url1 ',url1);         cartodb.createLayer(map, url2)         .addTo(map, 1)         .done(function (layer) {             console.log('added url2 ',url2);         })         .error(function (){             console.log('problem adding 2nd layer');         });     })     .error(function () {         console.log('There is something wrong with requested data!');     });   So if I wanted to hide the first layer that's loaded (url1) and select only certain points from the second layer (url2), how would I code that in my LayerActions section? I've tried the following, but nothing changes when I click the buttons:  var LayerActions = { all: function(){   layer.getLayer(0).hide;   layer[1].setSQL("SELECT * FROM spreadsheet");   return true; }, 2011: function(){   layer.getLayer(0).hide;   layer[1].setSQL("SELECT * FROM spreadsheet WHERE year IN ('2011') AND year IS NOT NULL");   return true; }, ... I see lots of tutorials telling me how to root my phone (Motorola Droid), but none of them mention any potential "side effects."  Aside from a few relatively minor issues that seem to require rooting to fix, I'm basically happy with the phone and therefore a little leery of messing with a device that cost me a lot of money and is only a few months old.  Assuming that I'm just talking about rooting, and none of the typical post-root actions (like installing a custom ROM), am I taking any risks by choosing to root?   Does it have the potential to brick the device? Will it void my warranty? Will I stop getting updates? Will the cops show up at my front door the next day? (Yes, I'm being facetious.) Anything else I should be aware of?   (See also: ) I was doing graph theory homework. I was counting the spaning trees of graph G. Such that G is two complete graphs on n vertices connected by two edges. I got to this expression: $$2n^{2\left(n-2\right)}+2\left(n^{\left(n-2\right)}\sum_{i=0}^{n-2}\binom{n-2}{i}\left(1+i\right)^{\left(i-1\right)}\left(n-i-1\right)^{\left(n-i-3\right)}\right)$$ I know that this expression gives the correct result, however, I was told by my teacher that it is possible to express that number in closed form e.g. without the summation. However, I have yet to find a solution. How to concatenate a variable number of csv, removing their header rows? When documenting location, should current or historical place names be used? When I am documenting records, do I use the name of a city or country as it is called today or as it was in the year an ancestor was there?  Related to: Does "staff" take a plural verb? Which one of these two statements is correct?     Our staff do ...      Our staff does ...   And is staffs ever correct? Why does my document 'error' when using '%' I am designing gamecards in LaTeX  Everything is going pretty ok so far but when i try to insert the %-sign for a question about percentages my file keeps giving errors.  I tried putting the percentage between dollarsigns because i know just % will make it a 'remark' and that the dollarsign makes it 'mathematical data'.   Whats the reason for the error?   P.s. the error says: file ended while scanning use of \kaart. ...    Codesample:   {\kaart{Bekijk statistiek kaart F:   Schat het percentage mensen dat als lievelingseten spaghetti opgaven, je mag er slechts $ 2% $ langs zitten. } { $ 11% $}} Name of component on output side cable of a DC power adapter? Copy complete structure of a table Using some methods, when you create a copy of a table you lose indexes, PK, FK, etc. For example in SQL Server I can say:  select * into dbo.table2 from dbo.table1;   This is just a simple copy of the table; all of the indexes / constraints are missing. How can I copy a table structure (without using a backup)?  I am primarily looking to do this manually, but if that's not possible I'll accept any solution. How to encrypt folders (not in Home)? Is there a way to encrypt a folder, which is not in Home (/home/user/) but even in a different partition, so only my user can access/read contained files?  Alternatively, I would like to understand if it is possible to turn a complete ext4 partition into an encrypted volume, which would be mounted at user login.  If possible, I would like to make the change without reinstalling Ubuntu.  My PC has (mount output):  /dev/sda1 on / type ext4 (rw,errors=remount-ro) /dev/sda3 on /home type ext4 (rw) /dev/sda4 on /home/igor/Personale type ext4 (rw)   sda4 is the partition containing folders I would like to protect. Evaluating $\int_{0}^{\infty}\frac{\sin^{2n+1}x}{x}\mathrm{d}x$ I was generalizing the following integral: $$\int_{0}^{\infty}\frac{\sin^{2n+1}x}{x}\mathrm{d}x \hspace{40pt} n\geq 0$$ We can start by noting that $\sin x =\dfrac{e^{ix}-e^{-ix}}{2i}$ and thus $\displaystyle \sin^{2n+1}x=\frac{(-1)^n}{2^{2n}}\sum_{r=0}^n (-1)^r \binom{2n+1}{r}\sin(2r+1)x$. This implies $$\begin{aligned}\displaystyle \int_{0}^{\infty}\frac{\sin^{2n+1}x}{x}\mathrm{d}x &amp;=\frac{(-1)^n}{2^{2n}}\sum_{r=0}^n (-1)^r \binom{2n+1}{r}\int_{0}^{\infty}\frac{\sin(2r+1)x}{x}\mathrm{d}x \\ &amp;=\frac{(-1)^n\pi}{2^{2n+1}}\sum_{r=0}^n(-1)^r\binom{2n+1}{r} \\ &amp;=\frac{(-1)^n\pi}{2^{2n+1}}\sum_{r=0}^n\left((-1)^r\binom{2n}{r}-(-1)^{r-1}\binom{2n}{r-1}\right)\end{aligned}$$ Where I have used the well known  $\displaystyle \int_{0}^{\infty} \frac{\sin(2r+1)x}{x}\mathrm{d}x=\int_{0}^{\infty}\frac{\sin x}{x}\mathrm{d}x=\frac{\pi}{2}$ and the property of binomial coefficients that $\displaystyle \binom{n}{r}+\binom{n}{r-1}=\binom{n+1}{r}$ Since the above sum telescopes, we have $$\displaystyle \int_{0}^{\infty}\frac{\sin^{2n+1}x}{x}\mathrm{d}x=\frac{(-1)^n\pi}{2^{2n+1}}(-1)^n\binom{2n}{n}=\frac{\pi}{2^{2n+1}}\binom{2n}{n} ~\forall ~ n\in \mathbb{Z^{+}}$$ I would like to know other methods for evaluating this integral. I am trying to find and replace the * (star, or shift+8) character in a bunch of formulas in Excel 2007.  * of course matches the ENTIRE contents of the cell, which is not what I want.  How do I disable this behavior? The equivalence of open-set definition of continuous mappings to the $\epsilon-\delta$ definition A function $f: M\rightarrow N$ is defined to be continuous iff $\forall$ open set $U\subseteq N$, the preimage of $U$ is also open.  I was trying to prove that such a definition would be equivalent to the $\epsilon -\delta$ definition in a metric space, and I could only do so if I assume $f$ is surjective, or otherwise a counterexample would be $g: \mathbb{R}\rightarrow\mathbb{R}$ where $g(x)=x^2$. As if I take $U=(-1,1)$, then its preimage is $[0,1)$, which is neither open or closed. In fact, any $U$ containing elements that cannot be achieved by $g$ would face the same problem.  So I was wondering that have I remembered the definition of preimage wrong, or do I need to make sure that $U$ must be chosen from the image set of $f$? mathtools: \dddot cause the term to rise Set::setraw error in implementation of bisection method I have inserted an image in my LaTeX document and the image always displays with the file path of the image directly above it.  How can I prevent this file path from displaying?  I am inserting the image like this:  \begin{figure} \centering     \includegraphics{C:/Users/Name/Pictures/image1.png} \caption{a caption} \label{fig:reference} \end{figure}   Here is a working example of document that produces this behaviour:  \documentclass{article}  \usepackage{graphicx} \begin{document} \begin{figure} \includegraphics{C:/Users/Name/Pictures/image 1.png}  \end{figure}  \end{document}   The image was inserted using the TeXnicCenter Insert>Picture function.  When I generate the pdf document, directly above any image (I have inserted multiple images using this technique) the file path displays above the image, in the case above it would show: "file\path\of\image", how can I prevent this from displaying?