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Mod-deleted This question has recently been undeleted. I have to admit that I'm stunned. There is nothing good about this Q&A: the questions consist a homework dump from a timed online quiz; they have apparently been copy-pasted here without any effort done to even format them correctly (the sentence "Answer both parts for full credit" is especially ...


22

This continues to be a divisive issue with neither side willing to compromise at all. Mathematicians being idealists of the purest kind that is hardly a surprise. I am somewhat impressed by the fact that hardly anyone is bringing up reputation in this discussion. In spite of our love/hate relationship with these internet points the rep game is a strong ...


19

There should be some continuity to the content of a post; an edit should be an edit, not a new post in the same box. Thus, if the second answer is completely different from the first I would go for a new post. If there are only major changes, but there is still some continuity an edit seems appropriate. It is not completely clear to me what was the case ...


17

I voted undelete before this thread was opened, so let me explain my stance: While it makes for a harmonious impression if adversarial exchanges are deleted, it makes it impossible to make an informed decision during a moderator election. Answering math questions is not sufficient qualification for being a good moderator. And even being a good moderator ...


17

Moderators can undeleted comments that were not deleted by the users. Namely, if you posted a comment and you deleted it, then moderators cannot undelete it. If, on the other hands, a moderator deleted the comment, then they can be undeleted by moderators. The problem is that you don't have access to deleted comments, so you can't quite edit them, or ...


16

I don't think we have, or should have, an official policy. To some extent this is a question of how much did you end up changing. If the correction is minor, by all means, edit and undelete. If the correction is an entirely different argument, I'd think it's a bit disingenuous to keep your votes from before, in some sense. Nevertheless, it is a good idea ...


13

Undeleted I would like this question to be undeleted. It was voluntarily removed by the author although a correct answer was given. Given the OP's history on MSE, it seems the user asks questions, gets answers, and then deletes the questions. I do not think this should be permitted, as some user in the future may have the same question as the OP, but a ...


11

[REOPENED] I would like to request Motivation for the Tensor Product be reopened as I do not think it is a duplicate of and Motivation for Tensor Product. The latter question asks "We already have Direct Product, Semi-direct products, so after all why do we need Tensor Product?", which is a question about why multilinearity is in general useful. The ...


11

Reopened This is on the chopping block again: Is zero a prime number? The question was the subject of this meta discussion: How to prevent the loss of excellent answers to poor questions. which resulted in reopening. (Disclosure, I have a solution on the question. I feel the question and solutions are worth fighting for, in this case.) The reason this ...


10

[UNDELETED] Request for undeletion, or explanation of deletion: https://math.stackexchange.com/a/898051/, a "hint" answer that does substantial work toward solving the differential equation in the question Differential equation $\sin \theta \frac{dr}{d \theta}+r\cos \theta =\tan \theta,0<\theta<\pi/2$. The answer received comments that it should be ...


10

Reclosed Please consider re-closing this question : Is it to the students' advantage to learn the language of infinitesimals? On the one hand, the question is primarily about pedagogy, which would be a better fit for a different SE site. But, more importantly, the question is essentially a request to engage in a discussion about whether there is an "...


9

[REOPENED] (Also, as pointed out by Asaf in a comment below, this was a duplicate request. My apologies for the inadvertent dupliaction.) The question "If every convergent subsequence converges to a then so does the original sequence" should be reopened (in my opinion). It is a request for clarification/explanation of an argument from a text. It was ...


9

Reopened, Put on hold, deleted, undeleted, deleted, re-undeleted, re-deleted, undeleted again, deleted again, locked, unlocked and reopened Please consider reopening What digits is the "number" $\infty$ composed of?. This question was closed as "not about mathematics". Obviously, this question is based on some misconceptions of what infinity is, ...


8

See the meta.SO page on deleted questions, in particular this section: Immediately after you delete a question, it will change color to indicate that it is deleted, and an undelete link will appear. If you have less than 10k reputation, you will not be able to see the link — or any part of the question — after you leave the page. Opening a new browser ...


8

Closed, re-opened Solve for $x^2 + 7x +1 = 3n(x^2 + x +1), n \in \Bbb{Z}$ My this question was put on hold as off-topic because it lacks context. It also gives a link to how I can add context. The link gave the following points Include your work My response - I answered that question which I asked. I got a few hints from the comments which helped me. ...


8

Reopened This meta question has been closed as a duplicate: Can we please STOP closing and deleting old posts with answers? However, it is not a duplicate. The older question is about deleting questions with answers, which is a more general question. (Indeed, it starts with the phrase "A few deays ago I posted an answer...") The newer question is about a ...


7

[REOPENED] This question was closed as a duplicate, but the question specifically asks not for a proof (which the OP knows) but, instead, for some intuition behind successful strategies for constructing such proofs - something that is not addressed at all in the proposed duplicate. Probably there is a good chance of further helpful answers appearing if it ...


7

Reopened Request for reopening: What would change in mathematics if we knew $\pi+e$ is rational? It was closed as unclear last March. I edited it to try to make it clear, and there are comments that (to me) show that the question can be answered reasonably. I voted to reopen, then it went through review and left with 3 selecting "leave closed."


7

Reopened, closed, reopened I just came across this question: Derivative of Square Root Visual after failing a reopen review audit and I'm wondering why it's still closed: unclear what you're asking. I agree that the MathJax formatting isn't the best, but it is still readable. The OP has actually shown what they've tried, and what they didn't get, so the ...


7

Reopened I edited the question Variable in upper bound of sum when it had 4 votes to close, and I also posted a rather detailed answer (which the OP accepted). It got "put on hold as unclear what you're asking" even though I think it's now quite clear and on-topic. Can the question be re-opened?


7

Reopened The OP added an attempt to Determine the number of ordered triple $(x, y, z)$ of integer numbers (negatives and positives) satisfying $|x| + |y| + |z| \le 6$ in a comment to an answer while there was still only one close vote. I have moved that attempt to the question. I think that the question now meets the criteria for context.


7

Closed, re-opened Please consider reopening What is wrong with this solution of find the least value of $ \sec^6 x +\csc^6 x + \sec^6 x\csc^6 x$. This question is closed as a duplicate of this previous question by the same OP: Find the least value of $ \sec^6 x +\csc^6 x + \sec^6 x\csc^6 x$ but the two questions are different. The closed question asks why ...


7

Undeleted, reopened, closed, reopened Minimum Elementary row/column transformations to find Inverse of given Matric This question was definitely not up to site standards, but it had a couple of really cool answers, one that I had awarded a bounty to. I think it's worth undeleting for the answers alone.


7

Undeleted, redeleted,re-undeleted and locked (but for how long?) About the Continuum Hypothesis asks a reasonable question that has been answered many times before. It was properly closed as a duplicate. But it was then deleted, even though it had six upvoted answers with scores from 3 to 13. I think this was unnecessary and counterproductive. I'd like ...


7

Undeleted, Reopened. Please consider undeleting and reopening this question which is a natural, well-written question on solid geometry that received a good answer. It's not clear to me why anyone thought it needed to be closed, let alone deleted.


6

Will you please to reopen https://math.stackexchange.com/questions/511326/specific-advice-tips-to-streamline-studying-math by virtue of its upvotes and those on my Answer. Will you please to appreciate the fact that most of the downvotes in its Meta thread (http://meta.math.stackexchange.com/questions/11145/how-to-adapt-or-emend-specific-advice-tips-to-...


6

[REOPENED. Thank you.] Will you please to reopen Infer distance from a point to a line, from the distance from a point to a plane [Stewart P793 12.4.44]? My question is tendered at the bottom of my question and there are no comments on why it is avowedly "unclear." I've made an ancillary edit that should only clarify the OP.


6

Please reopen https://math.stackexchange.com/questions/692746/intuition-if-f-differentiable-and-lim-x-to0-fx-l-then-f0-l This question is for intuition only and no proofs. The other is for proofs. Ergo they aren't duplicates. The closers left no comments?


6

[REOPENED] Becoming Better at Math was closed on the grounds of being primarily opinion-based. It is community wiki with soft-question and advice tags. Though there are many possible answers (hence the CW), I do not find the question to be opinion based, as it is a call for guidance from experienced mathematics students, who in general do not disagree ...


Only top voted, non community-wiki answers of a minimum length are eligible