Computing A, B given A+K and B+K
How does one attack a two-time pad (i.e. one time pad with key reuse)?
Vertical line for the the right margin in Notepad++ Does anyone know if Notepad++ can display a vertical line on the right margin to indicated that the text will or will not fit on a printed page?  I have looked but I cannot find it.  Word wrap does work, but it wraps by my screen width, not by the width of a printed page. I have to import large Shapefiles (> 1 million records) into PostGIS, and I have been wondering about the best way to do it.    In my question I used the word "hack", instead of tool, on purpose because I think this is not so much a matter of which tool, but which set of steps, or configuration settings to use. So far, I have tried the  plugin (QGIS), the  Postgis tool and the GDAL  tool. You can view my full review on  post. So far, I find all of them really unresponsive, when dealing with a large dataset. I was wondering if someone experienced a similar issue, and if you could share something about the approach. Are you allowed to stack Divine Smite and Eldritch Smite on the same attack? $pq\mid pn^q+qn^p+kn$ for some $k,\,$ if $p,q$ are primes I am running Ubuntu 14.04 from Windows, using virtualbox 5.0. I tried several options to make size of Ubuntu in virtual box larger, but none helped so far.   I am using latest virtual box with latest guest add on installed. sudo apt-get install virtualbox-guest-dkms virtualbox-guest-utils virtualbox-guest-x11 I went to Ubuntu 'software and Updates' and made sure that under 'Additional Drivers' tab, 'using x86 visualization solution...' is active. In virtualbox window, under view->virtual screen 1, all 'resize to' options are disabled.   None of these options helped. This is frustrating. Any comments or help? Can the problem be I am using 64 bit system? Does this problem occurs in earlier/later versions? If not, please suggest a 'good' version of Ubuntu for virtualbox. Double-column listing package Not too well up on LaTeX, but I want to use the listings package for listings spanning a two-column format.  Unfortunately, asterisks cannot save me (like for figures/tables); this doesn't work:  \begin{lstlisting*} ... \end{lstlisting*}   I've Googled about, but got no satisfactory answer, and getting a bit desperate. Should be simple... hope I'm not missing something stupid. Perhaps it's possible to embed this into a separate spanning float?  Help?  (P.S., I've posted this on the main stackoverflow site as well...  if this is considered a duplicate, please comment and I'll remove the other. Getting a bit desperate fighting a deadline.) Why are C# interface methods not declared abstract or virtual? How do I find this limit: $\lim_{n\to\infty} \left[ n-{n\over e}\left(1+{1\over n}\right)^n \right]$? I'm working on a practice exam for my masters quals and I am having difficulties with the following limit. According to wolfram alpha, it's value is 1/2. Does anyone know how to find this limit?   $$\lim_{n\to\infty} \left[ n-{n\over e}\left(1+{1\over n}\right)^n \right].$$ "grey" vs "gray" are both common equally in use? Yesterday I wrote "gray" in the meaning of the color, but my friend corrected me and told me to write "grey". Today I checked in the  and I found that they are both correct for the same meaning. So, now I just have doubt which one of them is more common in use. Windows 10 lets you 'schedule' a reboot for later. I want to disable it.  Evidently Windows scheduled itself for a reboot last night when I wasn't looking and just closed everything I had been working on the night before.  I reboot on the regular; I don't need Windows to do that for me.  Can I disable it completely? I don't mind if it downloads everything, and then says "hey, you should reboot," but it should never reboot itself, ever.  I'm using the "Pro" edition of Windows 10. Something I did in the first Animal Crossing was make a house on an alternate character solely to showcase bugs/fish I felt were too cool to only leave in the museum. However bugs can't be mailed or dropped, so I'm at a loss as to how to do this.  Is there a way I can give bugs/fish to a second character or will that character have to find them themselves? In other words, why do we need to connect the battery positive to the negative to get electron flow? As far as I know, voltage difference is what drives current flow.  From what I understand, there's a surplus of negative charge (electrons) in the positive end of a battery (weird I know, but I guess they do it for mathematical reasons). Between the positive and negative ends of the battery is some kind of wall that prevents the electrons from diffusing, so they have to go the long way (through a wire to the other end of the battery) to diffuse and reach the receiver atoms/molecules.  So why not just have the surplus of electrons on one end go to ground to equalize (e.g. 5 volts to 0 volts should produce current)? Why does it have to be the other end of the battery? I'm sure there's atoms/molecules in the ground that could accept the extra electrons (receivers atoms/molecules for the donors in the battery). How to get access to USB-storage from an application installed as Snap? I recently bought one of these ESR meters, a 'MESR-100':       It claims to be able to test capacitor ESR with the caps left in-circuit.  It appears to work well from my tests so far.  However, how much can I trust the in-circuit readings?  Are they going to be less accurate?  Are there certain circuit configurations where it wouldn't be possible to measure ESR in-circuit accurately?  [EDIT: Added the model as requested] : Approximation of real number to the power of irrational Say I have two numbers, $c\in\Bbb R^+\,,q\in\Bbb{R\setminus Q}$.  Is there a way to approximate the value of $c^q$?  This question bugging me because of how simple it sound in compare to how complicated it is. First I want to understand what a power of irrational number is, when talking about $\Bbb R^+$(I use this domain for sake of simplicity) we have very well defined actions for power a rational number, we can even use some theorems to get $c^{a/b}=\sqrt[b]{c^a}$, but when I am dealing with irrational number I can not do this.  I know that we have some definition for this because the solution of the equation $2^x=3$ is irrational.  So what exactly does it mean to take something to a irrational power and is there a way to approximate a numeric value for this? When I create a clan in the multiplayer menu, it says clan created but I cannot add or invite people to my clan. I go to create a new one assuming the request was canceled or not entered correctly, it says clan name already exists as if someone else created it.   Is this a bug? Did I do it wrong? Or am I missing something?   I'm on the PS3. Will this also happen on my Xbox 360 Version? If $a_0\in R$ is a unit, then  $\sum_{k=0}^{\infty}a_k x^k$ is a unit in $R[[x]]$ We know that $221 = 17*13$. So we can check if the system has roots to both of those equations separately, which it does:  $x^{5} \equiv 2$ mod $13$ has the solution $6 + 13n$ and $x^{5} \equiv 2$ mod $17$ has the solution $15 + 17n$.   I got these numbers from wolfram, I have no idea how to solve this problem WITHOUT a calculator. And even after finding these numbers. How would one obtain a solution modulo $221$? I was thinking the Chinese Remainder Theorem but I am under the assumption that CRT only applies to problems with powers of $x$ which are $1$.  Thanks. How to change the monitor's refresh rate? How do I change the monitor's refresh rate in Oneiric?   There is no option to do it in the Displays dialog now. By default it's 60Hz, but I need 75Hz on my monitor.  In previous releases there used to be such an option in the Displays dialog.  Edit - Half baked solution  The best I could do so far was:  xrandr -s 1280x1024 -r 75   This is perfect, but my problem is that it isn't permanent. It defaults back to 60 Hz after logging out and back in.  Perhaps this should go into some script and added to startup? I just don't know how to do that. I'm looking for a high current DC switch (able to switch something like 5V@30A) and I've encountered several DPDT that might do what I need, however they are only rated for AC applications (3A@250VAC or 6A@125VAC). Are these rating convertible to DC? or is that something that only the facturarer would know?