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The purpose of this thread is to help focus the attention of the community on posts that may require reopen and undeletion votes. A request should be posted as an answer below (one request per answer).

Some guidelines:

  • Please be polite, and respect the many different viewpoints in our diverse community. This goes for the person making the request as well as those commenting on it.

  • There is a reopen queue. Please wait until a post has gone through this queue, before posting here. Notice that the first edit after the question is closed pushes the question into the reopen review queue if the edit is done within 5 days of closure, and so does a reopen vote. (If the review has already been finished, it is shown on the timeline of the question.) When in doubt, wait 24 hours after the last substantive action.

  • To inform readers of the current (and past) states of the targeted post, please add the information Reopened or Undeleted at the start once the request has resulted in some action. (If the action is undone, add this too, like Reopened, Reclosed.)

  • Do not only post a request, like "request reopening of link". Instead, make a case for your concern. Yet keep in mind that it can be easier to get your request handled if you try to frame it in a way that takes the feedback the post received into account positively rather then seeking confrontation. Also, try to improve the post before posting here.

  • In case of "small" requests, like one missing vote, it can make sense to ask in chat instead of posting here. The room CURED is a reasonable place for such requests. The same guidelines apply there.

  • If you are involved in the thread which you post about (e.g., you asked the question or you answered it), please disclose this.


Earlier versions of this thread that served as a model:

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    $\begingroup$ I edited the post inspired by a concern expressed in a comment. $\endgroup$ – quid Jul 19 at 23:49

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Undeleted, closed, re-deleted (not by question-asker this time)

Please reopen https://math.stackexchange.com/q/3129981/290189 because the question asker has self-deleted his/her own post after getting an answer. The communnity has not got enough time to judge its value.

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Please undelete https://math.stackexchange.com/q/2192864/290189 because OP has self-deleted his question one minute after receiving an answer from me. This is an abuse of the system.

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    $\begingroup$ OP shouldn't have deleted it, but what a miserable excuse for a question! With all due respect, I don't think you should have answered it, not without first getting OP to bring it up to standards. $\endgroup$ – Gerry Myerson May 24 '19 at 2:47
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    $\begingroup$ The question was deleted one minute after receiving an answer, but this request was posted more than two years later. If the asker deleted the question to cover up the fact that they got help, then they already succeeded. I don't really see a reason to undelete this, because it would just get closed and deleted again. $\endgroup$ – user296602 May 24 '19 at 6:42
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Undeleted,reopened

+6 question with thousands of views and with two, +18 answers. Created in 2016, deleted last week.

Found by the SEDE query Suspicious question deletions from the last week.

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    $\begingroup$ Standard solve-my-problem-without-me post, and nothing spectacular about the answers. I oppose undeletion. $\endgroup$ – user296602 Jun 3 '19 at 10:29
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    $\begingroup$ @T.Bongers To me, it is absolutely non-trivial, if the sum of a singular and a nonsingular matrix is always nonsingular. The example in the accepted answer was catartic to me. Your attitude would be probably acceptable on the MO, but that is another site. Here sub-phd, maybe even pre-grad level questions are allowed, and you should view the quality and usefulness of a question on the level for which it is written, and not on yours. $\endgroup$ – peterh - Reinstate Monica Jun 3 '19 at 10:38
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    $\begingroup$ I have no idea at what level the question was written (and neither do you), because the asker never bothered to say anything at all beyond the statement of the problem. This is not a do-my-homework site, regardless of how little quality control some users want. $\endgroup$ – user296602 Jun 3 '19 at 10:44
  • $\begingroup$ @T.Bongers Maybe the user 1) is enough educated to be able to think about, is the sum singular and nonsingular matrix always nonsingular 2) But he is not enough well educated to know its answer? Is it enough narrow to know, who is he? Hm? Or should he have attached his CV to his question as well? $\endgroup$ – peterh - Reinstate Monica Jun 3 '19 at 10:47
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    $\begingroup$ This isn't a case for some hyperbolic slippery slope argument, and you know that. If the question had context, it could be appropriate for the site. $\endgroup$ – user296602 Jun 3 '19 at 10:51
  • $\begingroup$ @T.Bongers The required "context" what you would want so strongly, is clearly visible in the post. And you know that. This is a typical case of the dark direction what you made from this once so friendly and open site. $\endgroup$ – peterh - Reinstate Monica Jun 3 '19 at 10:54
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    $\begingroup$ I disagree with T.Bongers's comment: "Standard solve-my-problem-without-me post..." In what "standard", if exists at all, for a site "that is for people studying math at any level and professionals in related fields"? I disagree with the deletion in a way that I would strongly disagree with (possible in the future) deletion of this and this "standard" exercises (created 2016 and 2018) T.Bongers answered (nicely!). $\endgroup$ – Jack Jun 3 '19 at 11:55
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    $\begingroup$ @Jack Thanks for bringing those posts to my attention; I agree with your judgement of the first one (but not the second), and have started a close vote. I would delete my answer if I could, but it was accepted. Of course, it's clear that your comment is a disingenuous off-topic attempt to poison the well by calling me a hypocrite. So it goes. $\endgroup$ – user296602 Jun 3 '19 at 12:15
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    $\begingroup$ @T.Bongers: Thank you for your message. "it's clear that your comment is a disingenuous off-topic attempt to poison the well by calling me a hypocrite." Please don't put any word into my mouth that I did not say at all. I am sorry that you think it in that way. I do mean what I said and I do NOT mean to be sarcastic at all. Since we are talking about "deletion", I don't think my previous comment is off-topic. And yes, if you or others were going to vote to delete the linked posts that you answered, I would disagree and vote to undelete. $\endgroup$ – Jack Jun 3 '19 at 12:48
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    $\begingroup$ I'd like to remind everyone to keep it civil. $\endgroup$ – Asaf Karagila Jun 3 '19 at 15:17
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May I request to reopen this question Prime factor of $A=14^7+14^2+1$ so that everyone can see the beautiful answers?

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  • $\begingroup$ No, it's written that viewable only to members who have the close and reopen vote facilities and the OP $\endgroup$ – Shubhrajit Bhattacharya Aug 6 at 15:17
  • $\begingroup$ That sentence refers to the list of close voters, not to the post itself. $\endgroup$ – user279515 Aug 6 at 15:20
  • $\begingroup$ @Brahadeesh If a question is closed, there are always risks of being deleted (which might be a bit harder for this question due to the vote counts of the thread). $\endgroup$ – Arctic Char Aug 6 at 15:32
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    $\begingroup$ And to @ShubhrajitBhattacharya, I think it will be easier to get it reopened if you add more contexts into the question. Right now it is a plain PSQ. $\endgroup$ – Arctic Char Aug 6 at 15:35
  • $\begingroup$ @ArcticChar I agree, but that was not what Shubhrajit meant by his words: see his first comment for clarification. $\endgroup$ – user279515 Aug 6 at 21:03
  • $\begingroup$ It's too late to save this question. This question is from 4 years ago, and there is no way to recover the context from the comments like you can do with some questions. This is why we provide an incentive for questions to have attempts or working shown. $\endgroup$ – Toby Mak Aug 10 at 12:02
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Undeleted, deleted, undeleted, reopened

Minimize a+b+c+d given LCM(a,b,c,d)=1000 [closed]

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    $\begingroup$ The relevant rule is this: "Before voting to delete, please check whether there are any good answers; [...] We don't like to lose great answers!" By voting to delete the question, you violated this rule. $\endgroup$ – peterh - Reinstate Monica Jun 1 '19 at 17:00
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    $\begingroup$ I disagree with the way Xander disagreed: "I see no reason to undelete this question in it current form". I disagree with the deletion as I would disagree with (potentially possible) close/deletion of this question Xander answered: math.stackexchange.com/q/2414862 $\endgroup$ – Jack Jun 1 '19 at 17:16
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    $\begingroup$ @Jack I have no problem with the closure of the question to which you linked. I do find your targeted citing of that question interesting, and would note that when I answered that question, I had been active on MSE for a grand total of 2 months, and had not yet learned the norms. If I saw that question newly posted today, I would likely very quickly vote to close. $\endgroup$ – Xander Henderson Jun 1 '19 at 17:28
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    $\begingroup$ Normally when posting here, one is expected to put in an explanation for why this question should be undeleted, reopened, etc. The boldface line on the top is meant to indicate the status changes after posting, and not be a part of the request. $\endgroup$ – Asaf Karagila Jun 1 '19 at 17:28
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    $\begingroup$ @XanderHenderson: "I have no problem with the closure of the question to which you linked". Sorry I do. I would disagree with closing the question you answered nicely I linked and in particular I would strongly disagree with deletion of that linked post. I do not think there was/is a "norm" for deletion so far for the site except the general rule peterh quoted in a comment. $\endgroup$ – Jack Jun 1 '19 at 17:30
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    $\begingroup$ @quid I was impressed on them. It is subjective. But their score is objective. $\endgroup$ – peterh - Reinstate Monica Jun 1 '19 at 17:45
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    $\begingroup$ For moderator who keen on different opinions/ideas from his/her own by MSE users: "Please don't abuse your power to stir discussion up when users disagree with your (possibly not so wise) idea of deletion and 'and respect the many different viewpoints in our diverse community' ". $\endgroup$ – Jack Jun 1 '19 at 17:51
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    $\begingroup$ @peterh: I don't see how that situation on server fault is "similar". And again, I'd ask you to avoid using inflammatory language. It helps no one, except perhaps you, to release pent up anger. It's inappropriate, and deteriorates the remote option that anyone is going to have a discussion. $\endgroup$ – Asaf Karagila Jun 1 '19 at 17:54
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    $\begingroup$ @Jack so how about you respect others views or at least the rules of the site. $\endgroup$ – quid Jun 1 '19 at 17:54
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    $\begingroup$ If you think that this is somehow similar, you should spend a bit more time trying to learn the underlying software, the system of privileges, and what is the job of the moderators. $\endgroup$ – Asaf Karagila Jun 1 '19 at 17:57
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    $\begingroup$ @peterh the discussion is on-going since years. Just this morning I spent an hour with an other user to analyze data about this. Users (as opposed to moderators) are severely rated limited as concerns deletions. That you are miffed because three of your posts were deleted, does not mean that there is some problem. Yes, some users are against deletions, but again that's true since years. Maybe focus more on following rules regarding questions quality, then the issue regarding deletions will be of much less relevance. Don't cherry pick rules. $\endgroup$ – quid Jun 1 '19 at 18:15
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    $\begingroup$ @quid It is your decision, what will be a mod issue. I need to notice, too, this sequence of events: 1) one of my old posts is deleted, in my opinion, falsely. 2) I complain on the meta. 3) The post gets an undelete and a reopen. 4) 2 of my old posts are deleted. | I think, the nicest possible interpretation is that my meta post attracted some attention to my old main site posts. The lesser nice, but maybe more likely interpretation is that these were revenge deletions for my complains. $\endgroup$ – peterh - Reinstate Monica Jun 1 '19 at 18:44
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    $\begingroup$ @peterh the short questions are not blindly deleted but they are reviewed for potential deletion. Well your question has 0 score [correction: -2 now], which leaves use were exactly. Five users thought they want the question closed. Maybe there view also should count for something. Of course they did not all bother to dv in addition, but there opinion seems to be clear. Kindly stop the cherry picking and the quoting of half-sentences. However you want to frame it, the thread is not good. Also the high score is a high quality is a gross over simplification, as everybody knows. $\endgroup$ – quid Jun 1 '19 at 20:04
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    $\begingroup$ @peterh people evaluate your post and find it lacking. Of course you can pretend it's for other motives, but then way back then it was already closed. That some users upvoted the answer does not change that. It's well-known that often almost obvious stuff is especially well received because there are enough voters that can easily make sense of it. Again the answer is not good in the way I believe good is intended there. It's a correct yet completely standard answer to simple and contrived question. The site is better without that thread. $\endgroup$ – quid Jun 1 '19 at 21:53
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    $\begingroup$ I have edited the post (revisions, the version after my edit) in order to add at least some context. I have not case my undelete vote - I'll wait first to hear whether you are satisfied with the edit and leave some time for you if you want to edit it further. $\endgroup$ – Martin Sleziak Jun 3 '19 at 5:16
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Please undelete and reopen this elementary post:
How to find the value of the expression $\log_3(a)+\log_3(b)+\log_3(c)$ given that $a$, $b$, and $c$ are the roots of $24x^3 - 121x^2 + 87x - 8 = 0$?

I answered question in this post, and I do not consider it missing context at all. OP summarized his/her attempt succinctly in the post: "Finding the roots seems complicated." (If one can find the roots $a$, $b$ and $c$, one can of course plug them into the expression $\log_3(a)+\log_3(b)+\log_3(c)$ to find its value. This is a natural attempt. OP did not notice that one does not need to solve the cubic equation in order to solve this problem.) Such attempt is by no means "I tried to solve this problem myself, but it seemed complicated."

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    $\begingroup$ I will reiterate the comment I left before the question was deleted: I have read the question. The comment you cite does not seem to provide much context. Nearly any question on this site could be finished with the line "I tried to solve this problem myself, but it seemed complicated." Appropriate context would be, for example, a description of where this problem comes from, and what the asker is studying right now. A presentation of potentially relevant theorems and definitions would also provide context. $\endgroup$ – Xander Henderson Sep 30 '19 at 19:00
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    $\begingroup$ Moreover, the question has also been negatively received (while I don't usually consider voting on a question to be terribly compelling, it is a factor which should be considered), and neither of the answers is terribly compelling (J.G.'s answer has the advantage of being concise, while Jack's answer seems like overkill to me---why invoke Vieta's formulae (the question appears to be a question one might find in an elementary algebra class, though that context is missing; Vieta is, to the best of my knowledge, not generally taught in these kinds of classes). $\endgroup$ – Xander Henderson Sep 30 '19 at 19:06
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    $\begingroup$ Finally, @Jack, you insist that the question has context because the asker stated "Finding the roots seems complicated." Let us grant, for the sake of argument, that this is context. I do not see how it is sufficient context. Better context would be an indication of what the student is studying and and what level; a reference for the problem; a discussion of what theorems, definitions, or other results they know; etc. The point of asking for "work done" is to get an indication of the level of the student. In this case, knowing that they tried to find the roots doesn't give much insight. $\endgroup$ – Xander Henderson Sep 30 '19 at 19:11
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Ratio problem for aptitude exam in India [closed]

None of the questions was eligible for a deletion, and also their closure reason is highly problematic.

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    $\begingroup$ If the question was not eligible for deletion then how, pray tell, was it deleted? The question itself is nothing more than a problem statement, with only minimal context given (it is from some Indian aptitude exam). The question is unmotivated, and there is zero evidence of any effort having been made to answer the question. I see no reason to undelete. $\endgroup$ – Xander Henderson Jun 1 '19 at 16:39
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    $\begingroup$ As an addendum, I find your demanding tone to be unpleasant. It is your opinion that this question, and the one you linked to above, should be undeleted. It is your opinion that they should be reopened. It is your opinion that no valid deletion reason exists. Clearly, others disagree with you. Demanding that others take some action is unreasonable. Make a request, make your case, then wait for the community to decide. $\endgroup$ – Xander Henderson Jun 1 '19 at 16:42
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    $\begingroup$ I have no demanding tone. I see a content deletion rampage, targeting particularly me, possibly as a revenge action for my recent meta post, where I complained another rule violating content destruction. What you can see now, is that I try to do something about it. If it is "demanding tone" for you, let it be so, but it is not a reason to me to do anything differently. $\endgroup$ – peterh - Reinstate Monica Jun 1 '19 at 17:03
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    $\begingroup$ @peterh Your phrasing "Needs undelete, possibly reopen, no valid deletion reason exists" is very aggressive and demanding, and stating that no valid deletion reason exists is rather dismissive of the people who disagree with you. A lot of the site functions well because of consensus, not dismissive attempts at solo decision-making. (-1) from me, because I think this is a bad question to keep on the site. $\endgroup$ – user296602 Jun 1 '19 at 18:14
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    $\begingroup$ @T.Bongers Please check the end of the other discussion. I not only complained, I also analyzed SEDE data. I invested this effort because 3 of my old posts were deleted within days, what made me suspect that it was not pure coincidence. In the current discussions, I've seen only little arguments that the posts were really bad, however the relevant rules explicitly forbid the deletion of questions with good answers. $\endgroup$ – peterh - Reinstate Monica Jun 1 '19 at 18:33
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    $\begingroup$ @T.Bongers From here: "Before voting to delete, please check whether there are any good answers; [...] We don't like to lose great answers!" $\endgroup$ – peterh - Reinstate Monica Jun 1 '19 at 18:34
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    $\begingroup$ @peterh It says: "Closed questions that are of no lasting value whatsoever should be flagged and deleted." Thus, explain the lasting value of the post. Same for the other question. As far as I can tell there is no lasting value. It might be nice that you helped that other users even though they did not follow the rules regarding question quality, but lasting value, there isn't any. $\endgroup$ – quid Jun 1 '19 at 18:46
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    $\begingroup$ @peterh At least eight different experienced voters here think that the question is worth closure or deletion. Perhaps you could spend some time thinking about why that is, instead of just rules-lawyering to get the answer back. $\endgroup$ – user296602 Jun 2 '19 at 3:41
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    $\begingroup$ @T.Bongers My problem with your this comment, and with your attitude, that after the removal of the argument from authority part, nothing remains. Only a bunch of revenge votes. $\endgroup$ – peterh - Reinstate Monica Jun 2 '19 at 3:53
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    $\begingroup$ @T.Bongers It is interesting! I worked a lot on the answer. Only that a problem is not interesting you, is not a reason to click delete. Actually, doing that is a power misuse. There should be clear rules, what makes a question deletable, none of them was mentioned. $\endgroup$ – peterh - Reinstate Monica Jun 2 '19 at 5:18
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    $\begingroup$ @GNUSupporter8964民主女神地下教會 Btw, my these whole current activities were initiated by the following sequence of events: 1) some of my posts were closed and deleted on crap reasons. I remained silent that time. 2) yet another of my old posts were deleted. I initiated a discussion on the meta. 3) Two another of my old posts were deleted. It was clearly a revenge action from the 10k+ side. | Deleting posts by revenge votes is clearly one of the most serious power misuses, and should be punished harshly. However, the mods looked elsewhere, and said "no proof". --> this was the point as I started $\endgroup$ – peterh - Reinstate Monica Jun 14 '19 at 11:30
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    $\begingroup$ @GNUSupporter8964民主女神地下教會 my current activities, and I won't stop. I have the right to use the site as it should be used, I find it an ignorable surreality if you call this "rep farming", and I will fight the retroactive, massive content destructions until my last breath. So is it going, I am sorry. Downvoted posts don't deter me. Deleted posts don't deter me, I use them as examples of your hostility. The only what would deter me if you could somehow convince me, that what I want, is no good, but I think it will be a hard work. $\endgroup$ – peterh - Reinstate Monica Jun 14 '19 at 11:31
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    $\begingroup$ @GNUSupporter8964民主女神地下教會 After my comments yesterday, you've deleted my yet another answer, and I've got 5 downs. It all happened to my old posts. You are just a dirty mafia, and you have exactly zero moral base to complain any "rep farming", while you are downvoting and deleting main site posts as revenge, for unrelated meta activities. $\endgroup$ – peterh - Reinstate Monica Jun 16 '19 at 6:52
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    $\begingroup$ @GNUSupporter8964民主女神地下教會 I know very well, why. And also you know the "why" very well. I will continue this discussion if you stop playing the fair one, while your revenge actions are clearly visible. | Btw, the mods seem relative inactive in such infights, compared to other sites - on other sites, they had already probably intervened for my vehement style. However, they had probably intervened also for your retributive, revenge actions. $\endgroup$ – peterh - Reinstate Monica Jun 16 '19 at 9:47
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    $\begingroup$ @GNUSupporter8964民主女神地下教會 Oh yeah, of course "no revenge"... $\endgroup$ – peterh - Reinstate Monica Jun 17 '19 at 8:59
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