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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 ...

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Let me give a few points in the history of this meta thread: MK asks three questions; two had a negative sum of votes and automatically deleted, another was closed by five non-moderator users, and then deleted by another three. MK asks "Why was my question deleted?" and Mariano points out that it was an automatic process. Bill takes upon himself to undo the ...

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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 ...

12

I don't know the particular open/close history of the question, but I can't see any reason why it should be closed (and it is strange that it should have a negative vote total). It is a perfectly good question in number theory (in fact a rather famous one!), and I would certainly vote to reopen it if it were closed. Added: It seems that the question of ...

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The FAQ rather clearly states You should only ask practical, answerable questions based on actual problems that you face. Chatty, open-ended questions diminish the usefulness of our site and push other questions off the front page. The question in its original form amounted to "Why could somebody at some point in time think that algebraic topology ...

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[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 ...

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[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 ...

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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 "...

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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 ...

9

Since Bill hasn't seen fit to answer this question, I will. Two of Makoto Kato's questions were automatically deleted by the system. MK requested undeletion, and Bill complied. While doing so, he also undeleted this question, incorrectly believing that it had also been automatically deleted. While Bill feels personally that such questions should not be ...

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[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

The review queue shows only things that you can act. Since you already voted to reopen, you won't see it. If you have 10k points you can access the global review history, and see if others have acted on this reopening request or not. You can use this link to see what's going on: https://math.stackexchange.com/review/reopen/283217

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I have had a number of cases where the question was closed because it was badly phrased but I thought I could understand the intent and could provide a good answer. I posted a comment asking that the question be reopened so I could answer and had no success. I suspect that most people do not look at closed questions so accumulating enough votes to reopen ...

8

Yes, in general one should wait. Browsing this list https://math.stackexchange.com/review/reopen/history of reviews (the link will not work for everybody, sorry) one will notice that there are plenty of questions each day that get some reopen vote and of which somebody thus thought they have a case for being reopened. If each of them was posted in that ...

8

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

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. ...

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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.

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This is because it is possible that a question can have five reopen votes from users with above 10k reputation even whilst it remains deleted. An old post on the main meta explains some reasons why this is allowed, so it is not a system bug. However, it is not possible to vote to close a question when it has already been deleted. As you have probably ...

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The community has spoken: the question is now re-opened. (Posting this as an answer just so we can get it accepted so it won't be bumped to the front page in the future.)

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For full disclosure at the prompting of Asaf, here is the full transcript of comments from the post (the red shaded ones are deleted by moderator). It is too verbose to try to copy/paste/reformat everything, so I just took a screen grab. It will be more legible if you click through to the full sized images. The time should be measured w.r.t. to the creation ...

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[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 ...

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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."

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Someone could understand it well enough to answer it, so surely someone will be able to make it clear. If it is literally impossible to make the question clear, then it has no place on this site. Otherwise, then the question should be edited first and only then reopened. It makes no sense to reopen it when it is still unclear; that somebody managed to read ...

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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 ...

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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.

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Reopened This question I asked was closed for lacking context. After context was added, the hold was never lifted, and eventually was closed. $X,Y$ not homeomorphic if $X\backslash x$ is disconnected for all $x\in X$ but $Y\backslash y$ is connected for some $y\in Y$

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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 ...

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Undeleted, and closed as off-topic, re-deleted, undeleted (after editing) Please consider undeleting the following post: What is the area of the shaded region. Considering the high quality of several answers to the question, I do not think we should delete the post.

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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 ...

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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 ...

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