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How did Toru and Koji pass the entrance exam in My Hero Academia? I have seen some comments and speculations about the robot having an off switch or whatever. But I want to know if there is any source material or comment from the author on how they managed to pass the exam.  I have only seen the actual author's comment on Mineta:     But I was wondering if there are author notes for the other characters. I was trying to look for an answer of mine earlier and did a search like this:  user:me SQLite RunInTransaction   The above found nothing. So I changed it to  user:me SQLite   Which found a bunch of things. I dug through the results and saw this snippet for :     From my experience, wrapping as many database calls as possible into a transaction speeds things up quite a bit: using (var db = new SQLiteConnection(dbPath)) { db.RunInTransaction(() => { …    Notice that the snippet contains both "SQLite" and "RunInTransaction". In looking at the post itself I noticed "SQLite" was in the question title and in my answer as code. I also noticed that "RunInTransaction" is only in my answer in code.  I looked at meta and saw , which says I need to prefix any code with code:, so I tried:  user:me SQLite code:RunInTransaction user:me code:SQLite code:RunInTransaction   None of the above returned any results.  I also found  on meta which says I can search for code like this (without the code: prefix):        So I tried:  SQLite RunInTransaction "SQLite RunInTransaction"   The first did not return my answer. The second did not return any results.  So my question:  How do I properly search for , that has both "SQLite" and "RunInTransaction" in the post? Hungerford's book of algebra has exercise $6$ chapter $3$ section $6$ [Probably impossible with the tools at hand.]:     Let $p \in \mathbb{Z}$ be a prime; let $F$ be a field  and let $c \in  F$. Then $x^p - c$ is irreducible in $F[x]$ if and only if $x^p - c$   has no root  in $F$. [Hint: consider two cases: char$(F) = p$ and   char$(F)$ different of $p$.]   I have attempted this a lot. Anyone has an answer? How to define servlet filter order of execution using annotations in WAR How to change kernel at boot I installed the latest kernel (4.1) and want to boot into it instead of 3.9. How can i do this on ubuntu 15.04? Which is more idiomatic in a bash script: `|| true` or `|| :`? I don't do terribly much shell scripting, so I was a little surprised when I was reading  and I saw the syntax they used in this documentation:     A non-zero return from the command in any submodule causes the processing to terminate. This can be overridden by adding || : to the end of the command.   I had to look up that || : was a shorthand for forcing a command to exit successfully.  Anytime I've had to make a command exit successfully, I used || true.  Is || : considered to be more idiomatic? I have the following recurrence that I've been pounding on:  $$ a(0)=1\\ a(1)=1\\ a(2)=2\\ a(2n)=a(n)+a(n+1)+n\ \ \ (\forall n&gt;1)\\ a(2n+1)=a(n)+a(n-1)+1\ \ \ (\forall n\ge 1) $$  I don't have much background in solving these things, so I've been googling around looking for different techniques. Unfortunately, I haven't been able to correctly apply them yet. So far I've tried:   Characteristic equations Generating functions Plugging it into Wolfram Alpha Telescoping Observation   I'm sure that one or more of these is the way to go, but my biggest problem right now is figuring out how to deal with the idea that there are different equations for odd and even values of $n$. I'm not necessarily looking for a solution (though it would be gratefully accepted), but any nudges in the right direction would be much appreciated.    To follow up, it turned out that the speed problem described in my comment, below was related to the Decimal implementation in Python 2.7. Switching to Python 3.3 (and Java) made everything many orders of magnitude better. The sum of powers of two and two's complement – is there a deeper meaning behind this? Integral of $\sin(e^t)dt$ Let $f(x) = \int_x^{x+1} \sin(e^t)dt$. Show that $$ e^x|f(x)| &lt; 2 $$ and that $$ e^xf(x) = \cos(e^x) - e^{-1}\cos(e^{x+1}) + r(x) $$ where $|r(x)| &lt; Ce^{-x}$ for some constant $C$.  I can do the first part easily. Integration by parts gives us $$ f(x) = \frac{\cos e^x}{e^x} - \frac{\cos e^{x+1}}{e^{x+1}} - \int_{e^x}^{e^{x+1}} \frac{\cos u}{u^2}du, $$ so substituting $\cos u = 1$ and $\cos u = -1$ gives \begin{align*} \cos e^x - 1 + \frac{1}{e}\left(1- \cos e^{x+1}\right) &amp;\leq e^xf(x) \leq \cos e^x + 1 - \frac{1}{e}\left(\cos e^{x+1} + 1\right)\\ -2 &amp;&lt; e^xf(x) &lt; 2 \end{align*} So that $e^x|f(x)| &lt; 2$.  I get stuck on the second part, though. From integration by parts, I have $e^xf(x) = \cos e^x - e^{-1}\cos e^{x+1} - e^x\int_{e^x}^{e^{x+1}} \frac{\cos u}{u^2}du$, so it reduces to showing that $$ \left|\int_{e^x}^{e^{x+1}} \frac{\cos u}{u^2}du\right| &lt; Ce^{-2x} $$ for some constant $C$. However, I always end up with a constant for $Ce^{x}$ rather than for $C$. How to convert .bib generated by Mendeley for use with amsrefs I'm using TeX live 2010.  I have a .bib file generated from Mendeley, and  I want to use that with amsrefs, but it's confusing and the amsrefs documentation is somewhat hard to follow: how do I massage the .bib file into something that amsrefs can stomach. (I'm using amsart as the document class). $x^y+y^x>1$ for all $(x, y)\in \mathbb{R_+^2}$ Prove that $x^y+y^x&gt;1$ for all $(x, y)\in \mathbb{R_+^2}$. I'm using IEEEtran to format an article, and I wanted to include an image. I included the graphicx and hyperref packages, and used the following code, like normal, to include an image.  \begin{figure}[!t] \centering \includegraphics[width=3in]{fetch} \caption{Pipeline: Fetch Instruction} \label{fig:fetch} \end{figure}   What appears, however, is this:    Fetch.png is a file in the directory, and if I remove it, pdflatex errors instead of producing an output. I'm using MiKTeX 2.9 on Windows 7. Any ideas? A linear operator commuting with all such operators is a scalar multiple of the identity. How to extract and join files xxx.zip, xxx.z01 and xxx.z02 I have three files 1.zip, 1.z01 1.z02. I would like to extract and join them into a file, by right clicking 1.zip and selecting "Extract Here". But then there comes an error:     7-Zip 9.04 beta  Copyright (c)   1999-2009 Igor Pavlov  2009-05-30   p7zip Version 9.04   (locale=en_US.utf8,Utf16=on,HugeFiles=on,2   CPUs)      Error: /home/tim/Desktop/1.zip:   Can not open file as archive      Errors: 1   I was wondering what the problem it is and how I can solve it?  Thanks and regards!    ADDED: Is my usage of "unzip -FF" wrong? It seems not work:  $ unzip -FF 1.zip  Archive:  1.zip warning [1.zip]:  zipfile claims to be last disk of a multi-part archive;   attempting to process anyway, assuming all parts have been concatenated   together in order.  Expect "errors" and warnings...true multi-part support   doesn't exist yet (coming soon). file #1:  bad zipfile offset (local header sig):  0   Thanks again!  2nd ADDED: Still ain't right.  $ cat 1.z01 1.z02 1.zip &gt; combined.zip &amp;&amp; unzip -FF combined.zip Archive:  combined.zip warning [combined.zip]:  zipfile claims to be last disk of a multi-part archive;   attempting to process anyway, assuming all parts have been concatenated   together in order.  Expect "errors" and warnings...true multi-part support   doesn't exist yet (coming soon). warning [combined.zip]:  209829313 extra bytes at beginning or within zipfile   (attempting to process anyway) file #1:  bad zipfile offset (local header sig):  209829313   (attempting to re-compensate)  extracting: 1.wmv   bad CRC ee181eef  (should be f3c61875)   It generated 1.wmv, which can play well only until  midway in Gnome Mplayer.  3rd ADDED: Am I using 7z wrongly:  $ 7z e 1.z01  7-Zip 9.04 beta  Copyright (c) 1999-2009 Igor Pavlov  2009-05-30 p7zip Version 9.04 (locale=en_US.utf8,Utf16=on,HugeFiles=on,2 CPUs)  Processing archive: 1.z01  Error: Can not open file as archive  $ 7z e 1.zip  7-Zip 9.04 beta  Copyright (c) 1999-2009 Igor Pavlov  2009-05-30 p7zip Version 9.04 (locale=en_US.utf8,Utf16=on,HugeFiles=on,2 CPUs)  Processing archive: 1.zip  Error: Can not open file as archive $x,y,z$ are independent and uniform random on $[0,1]$.  I know that $P(x \geq yz) = 3/4$ by triple integrating the triple density function.  However, is there a easier way to get this solution? Without triple integration. "physical block size is 2048 bytes, but Linux says it is 512" when formatting USB - How to create a bootable USB without this error Problem with typesetting maths content in an unusual font in beamer Using awk to sum the values of a column, based on the values of another column How do the Hat Dash points work? We're injecting records into a journey using a Salesforce data event.  I also want to advance the people in the journey based on updates that happen in Salesforce (e.g., as an Opportunity record advances through the sales process), but I can't figure out how to do that.  I've read all the documentation I can find, but there doesn't seem to be a Journey Builder widget that will wait to be prompted by an event in Salesforce before continuing someone on a journey.  At the moment, I'm completely stuck.    I'd greatly appreciate any advice or information on how I can make journeys event-driven in this way.  Thanks very much!