Can team members vote for my posts?
How to vote on friends / colleagues ' questions (or answers)
Disallow downvoting other answers if I've posted my own Possible Duplicates:        As Dan Dyer mentioned in his comment on , there is a conflict of interest when you have posted your own answer and are allowed to downvote other answers.  Despite the vote editing window being drastically reduced, the fundamental problem remains: I can downvote the other answers permanently and still benefit - my answer gets upvoted ONCE and wham, I have just made up the rep loss for my 10 other downvotes. The vote editing window fixes part of the problem, but there is a more complete fix that has the extra benefit of not preventing legitimate vote changes: to disallow downvotes on competing answers when you have posted one yourself.  The temptation to wrongfully downvote competing answers is huge. The rep loss is tiny in comparison. It has to be in order for people to continue to legitimately downvote.  Details:   If I have previously voted and then post my own answers, delete my downvotes. Continue to allow me to remove the upvotes - I think this is fully legitimate. If I delete my answer it's probably best to continue to deny downvotes (perhaps even including the question), but I don't have a strong opinion either way. Can't use my sprint key and jump at the same time Ok, so I do a lot of sprint jumping in minecraft because I pvp a ton everyday and every once in a while it won't allow me to do both at the same time. I set ctrl to my sprint key so when I want to sprint I hold ctrl. If I hold ctrl and space it won't let me jump. If I double tap w I can sprint and jump at the same time. Does anybody know why it does this? It's not something to do with my keyboard because it's just fine. It's done this a couple of times and it's quite annoying. How to send array with CURL? Should I `urlencode` it? In PCA, when the number of dimensions $d$ is greater than (or even equal to) the number of samples $N$, why is it that you will have at most $N-1$ non-zero eigenvectors? In other words, the rank of the covariance matrix amongst the $d\ge N$ dimensions is $N-1$.  Example: Your samples are vectorized images, which are of dimension $d = 640\times480 = 307\,200$, but you only have $N=10$ images. Cardinality of a set A is strictly less than the cardinality of the power set of A Decorate Tables You have $r$ red, $g$ green and $b$ blue balloons. To decorate a single table for the banquet you need exactly three balloons. Three balloons attached to some table shouldn't have the same color. What maximum number $t$ of tables can be decorated if we know number of balloons of each color?  I know the answer will at least be $\min(r,g,b)$. Also we need to add tables with $2$ reds, $2$ blues or $2$ greens. I cannot think of the formula for it X Windows special programs: do some of these still exist? Earlier I asked a question about  and got the answer that while it is only necessary for anonymous types, that it is used nonetheless to make writing code 'quicker'/easier and 'just because'.  Following  I saw that var gets compiled down to the correct type in the IL (you will see it about midway down article).  My question is how much more, if any, IL code does using the var keyword take, and would it be even close to having a measurable level on the performance of the code if it was used everywhere? Pivot rows into multiple columns I have a SQL Server instance that has a linked server to an Oracle server. There is a table on the Oracle server called PersonOptions which contains the following data:  ╔══════════╦══════════╗ ║ PersonID ║ OptionID ║ ╠══════════╬══════════╣ ║        1 ║ A        ║ ║        1 ║ B        ║ ║        2 ║ C        ║ ║        3 ║ B        ║ ║        4 ║ A        ║ ║        4 ║ C        ║ ╚══════════╩══════════╝   I need to pivot that data so the results are:  ╔══════════╦═════════╦══════════╦══════════╗ ║ PersonID ║ OptionA ║ Option B ║ Option C ║ ╠══════════╬═════════╬══════════╬══════════╣ ║        1 ║       1 ║        1 ║          ║ ║        2 ║         ║          ║        1 ║ ║        3 ║         ║        1 ║          ║ ║        4 ║       1 ║          ║        1 ║ ╚══════════╩═════════╩══════════╩══════════╝   Any suggestions? Does Google Chrome has anything similar to about:blank page in IE and Firefox? I did not find any suitable page mentioning this? PS: I tried about:blank but it looked like Chrome is trying to load something before showing blank page... MacBook [Pro] - how many displays, what resolution/frequency? How do I find out the number, type, resolution &amp; refresh rate of additional monitors I can attach to my MacBook or MacBook Pro?  This is an attempt at a canonical QA, as per the Meta QA -   to try prevent the myriad "same but different" questions we get on every possible combination of computers, cable &amp; monitors There are perfectly good resources out there that Ask Different should not have to duplicate the efforts of. Probability that the sum of 6 dice rolls is even A limit question (JEE $2014$) The following is a JEE (A national level entrance test) question:  Find the largest value of the non-negative integer ( a ) for which:  $$ \displaystyle \lim_{x \to 1} \left( \dfrac{-ax + \sin(x-1) + a} { x + \sin(x-1) -1 } \right)^{\dfrac{1-x}{1-\sqrt x} } = \dfrac 1 4 $$  On solving this, we get $ a = 0 $ or $ a = 2 $. So we take the answer as $ 2 $. But the official answer key says that the answer is $ 0 $. The reason given (not in the official key - they simple contain the answer. I saw the reason in an "unofficial" solution to the question paper) is that if $ a = 2 $, then the term $\displaystyle \dfrac{-ax + \sin(x-1) + a} { x + \sin(x-1) -1 } $ tends to a negative value ( $-0.5$ ). So $ a = 0$.  BUT:  By putting $a = 2$ in the limit, and inputting that to wolframalpha (), the answer turns out to be $0.25$. So, by putting $ a = 2$ also, we get the same value of the limit - $0.25$.  How to solve this dispute? Also, could you please check with Mathematica? Unfortunately, I don't have access to it!  (This is very important as the change in the answer key will affect the rankings in a dramatic way) I've been having trouble getting my server to send email and I haven't for the life of me figured out how to fix it. If anyone could give me some simple pointers, that would be muchly appreciated!  May 19 15:36:03 ubuntu-12 sm-mta[2484]: s4JFa3jp002484: from=&lt;www-data@ubuntu-12.04-     production&gt;, size=412, class=0, nrcpts=1, msgid=&lt;201405191535.s4JFZw4c002483@ubuntu-12.04-  production&gt;, proto=ESMTP, daemon=MTA-v4, relay=ip6-localhost [127.0.0.1] May 19 15:36:03 ubuntu-12 sendmail[2483]: s4JFZw4c002483: to=myname@mycompany.com, ctladdr=www-data (33/33), delay=00:00:05, xdelay=00:00:05, mailer=relay, pri=30123, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (s4JFa3jp002484 Message accepted for delivery) May 19 15:36:03 ubuntu-12 sm-mta[2487]: s4JFa3jp002484: to=&lt;myname@mycompany.com&gt;, ctladdr=&lt;www-data@ubuntu-12.04-production&gt; (33/33), delay=00:00:00, xdelay=00:00:00, mailer=esmtp, pri=120412, relay=mailserver.mycompany.com. [213.171.216.115], dsn=5.0.0, stat=Service unavaila$ May 19 15:36:03 ubuntu-12 sm-mta[2487]: s4JFa3jp002484: s4JFa3jp002487: DSN: Service unavailable May 19 15:36:03 ubuntu-12 sm-mta[2487]: s4JFa3jp002487: to=&lt;www-data@ubuntu-12.04-production&gt;, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=30000, dsn=2.0.0, stat=Sent When can you build up all representations from the fundamental and antifundamental ones? Under what conditions can you determine all representations of a Lie algebra from the fundamental and antifundamental ones using just the tensor product, direct sum and Clebsch-Gordan decomposition? I think this is true for $\mathfrak{su}(2)$ and $\mathfrak{sl}(2,\mathbb{C})$, or at least that's what physics books lead me to believe!   Is it true in general for semisimple Lie algebras? Can a Rogue (D&D 3.5) use sneak attack on both the first and second attack? Elsevier has started circulating  as a consequence of the  to the editors of their journals:     Subject: US editors and reviewers can no longer handle submissions by   authors employed by the Government of Iran            Dear Dr Bruno Granier,      The Office of Foreign Assets Control (OFAC) of the US Department of   the Treasury administers and enforces economic and trade sanctions. As   a result of OFAC sanctions we have been made aware that US editors, US   Elsevier staff and US reviewers are now unable to handle scientific   manuscripts where any of the authors are employed by the Government of   Iran. This includes the research departments of the various oil and   gas companies which are deemed to be entities of the Government of   Iran. We realize that this OFAC regulation will cause some   inconvenience in your role as an editor but Elsevier is legally   obliged to ensure that all reasonable efforts are made to avoid   submissions from Iranian government agencies and companies being   handled by US editors, US Elsevier staff and US reviewers. Please be   aware that editors, Elsevier staff and reviewers from outside the US   may still handle these manuscripts and that this OFAC regulation does   not pertain to manuscripts where the authors are based at Iranian   academic and research institutes. Manuscripts originating from a   clinical setting that are not government run, for example, a hospital   or clinical practice are also exempt from this regulation.      To view the official OFAC regulation, please click here. In practice   the result of these sanctions will mean that:      • Submissions where any author is based in Iran, and is not at an   academic and research institution, cannot be handled by US-based   editors, US Elsevier staff, US reviewers, or any US citizens based   outside of the US.      • If an Iranian author has dual affiliations (eg. university and   government), their submission cannot be handled by US-based editors,   US Elsevier staff, US reviewers, or any US citizens based outside of   the US.      • Affiliations of Iranian authors should therefore be checked, and any   manuscripts which fall under this OFAC regulation delegated to a   non-US editor, before handling.      • When assigning reviewers, affiliations of Iranian authors should   also be checked, and any papers which fall under this OFAC regulation   should only be sent to non-US reviewers. (As an editor you should do   what is reasonable to determine the nationality of a reviewer e.g.   check their email address. This check does not extend to emailing   reviewers directly to confirm their nationality or location). Unless   there is specific knowledge that a non-US-based reviewer is a US   citizen, editors can send such submissions to reviewers based outside   the US.      • If your journal workflow involves all submissions being handled by   US-based Elsevier staff, they will reject these manuscripts outright   before they reach you.      • Should there be no suitably qualified editor or reviewer, please   reject the manuscript outright.      When rejecting manuscripts which fall under this OFAC regulation   please use the new EES Decision Term "Reject - OFAC Sanctions" and the   following text:      "As a result of OFAC sanctions all editorial staff who are US-based/US   nationals are unable to handle scientific manuscripts which are   authored by Iranian scientists, employed by the Government of Iran.   Based on this OFAC regulation we are unfortunately unable to handle   your manuscript. We wish you success with your submission to another   Journal."       We apologize for the inconvenience this may cause. If you do have any   questions please contact your Publisher.       Sent on behalf of Dan Lovegrove      Cretaceous Research   Has there been any public response, by US editors or reviewers, stating whether they will obey (or not) the instruction? Also, does this letter conflict with the  of the  (all Elsevier journals are members of COPE as of January 2008)? Style every four posts differently Possible Duplicate:          Is it possible to style every four posts differently? I mean something like this:  &lt;div class="row"&gt; &lt;div&gt;1st post&lt;/div&gt; &lt;div&gt;2nd post&lt;/div&gt; &lt;div&gt;3rd post&lt;/div&gt; &lt;/div&gt; &lt;div class="row&gt; &lt;div&gt;4th post&lt;/div&gt; &lt;/div&gt; ...Repeat   I'm using , so it would be great if I could experiment more with that.. :) Allow diamond moderators to reverse question migrations? It has happened on occasion, due to the high amount of 10K moderators on SO that questions are migrated to the wrong site, and needs to be reversed. Although currently it is possible to re-open the question on the original site and delete the one on the destination site, it still leave the migrated too banner behind.  It would be useful if diamond moderators could reverse a migration, removing it from the destination site completely and re-activating it on the original site and at the same time removing the banners.  Previously it has been discussed educating the users around when to move questions, however this doesn't stop the problem.  As per Shog9  I have to admit I do like Shog9's suggestion regarding the post being closed as not programming related rather then re-opened, however, reasons for closing it on other sites should also be kept in mind, as this also applies to stuff being sent back forth between the sites. Some Data Failed to Reconstruct, Motion Tracking I added tracks and stuff, but then when I tried to solve motion track, there was a error that said:     Some Data Failed to Reconstruct   and it also said to look into the console for details, which I did. This is what the console said:    By my understanding, my video is 372 frames long, and Blender is cutting the footage at 318 for some reason. Here is the image of the scene:    Why? Here are links to  and also . Also the next morning I did a camera solve, but then most of the frames went red.