# Requests for Reopen & Undeletion Votes (volume 07/2018 - today)

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 was put on-hold pushes the question into reopen review queue, if the edit was done within 5 days of closure. So does a reopen vote. (If the review has already been finished, it is shown on the timeline of the question.) 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 once the request resulted in some action the information Reopened or Undeleted at the start. (If it the action is undone, add this too, like Reopened, reclosed.)

• Do not only post a request, like "request reopening of ". 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 in a away that takes the feedback the post received into account in a positive way 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 CRUDE is a reasonable place for such requests. The same guidelines apply there.

Earlier versions of this thread that served as a model:

Can this answer (on permutation groups) be undeleted:

https://math.stackexchange.com/a/3197094/10513

It was deleted for not providing an answer to the question. However, it gives a decent hint which leads to a solution. The hint is essentially "consider odd vs. even numbers". This was made formal in the accepted answer, which used mod 2.

• I think it's a bit of a stretch from that hint to the accepted answer. The hint ought to be a comment (in my opinion). – Gerry Myerson Apr 29 '19 at 12:50
• @GerryMyerson Hints are a grey area. But I don't think deleting them because they are "a bit of a stretch" is the right thing to do. – user1729 Apr 29 '19 at 12:55
• It would have been better, had a moderator converted the "answer" to a comment. You could try flagging the question for moderator attention, and making that suggestion. – Gerry Myerson Apr 29 '19 at 12:59
• I flagged it beforehand, and was told to post my request here (admittedly i didn't suggest making it into a comment) – user1729 Apr 29 '19 at 13:19
• OK, now you know what to do. – Gerry Myerson Apr 29 '19 at 13:22

Undeleted, Merged and then deleted

Please reopen https://math.stackexchange.com/q/3208119/290189 since OP has self-deleted his/her own post after getting an answer. The community should have been given enough time to vote.

• You can't reopen a question that isn't closed, GNU. Now it has been closed, as a duplicate, but I don't see how $x^y+y^x=(xy)^2-19$ is a duplicate of $x^y-y^x=xy^2-19$. So, I'm flagging for moderator attention. – Gerry Myerson Apr 30 '19 at 13:47
• @GerryMyerson By the moment I posted this answer, I did voted to close this question as missing context. I did notice the difference between the two. Thanks for reminding me. – GNUSupporter 8964民主女神 地下教會 Apr 30 '19 at 13:52
• @GerryMyerson a problem is that the original version of the question was incorrect. A third party edited it to this version, while main OP had re-asked a different version. – quid Apr 30 '19 at 15:32
• I deleted it after the merge now. This did not work out ideally, but it's near impossible to fix. If somebody wants that version of the question on the site I recommend to ask it anew. – quid May 2 '19 at 18:17

Please unmark the duplicate of this question. I have clearly said that my question has nothing to do with duplicate one. I am asking totally different thing and the duplicate question's answer does not help me at all. It is also an unique question which follows m previous question.

• I don't believe the relationship between the Questions is quite so simple as one "has nothing to do with" the other. Both involve intersections between two spherical caps, although you might not have visualized your problem in this way. There might still be a further problem in stating the area in terms of how you parameterized the spherical region, I grant, but it would be worth understanding the solution of the proposed duplicate to try restating the area given there in your terms. – hardmath Jun 6 '19 at 17:11

Undeleted, closed, deleted, undeleted, redeleted

I nominate Solve the recurrence $$\sqrt {x_n} − 5 \sqrt {x _{n−1} }+ 6\sqrt {x_{n−2}} = 0$$ for undeletion because OP has self-deleted his post shortly after receiving an answer. That's rude to the answerer.

• I agree that the question should not have been deleted by the original asker, and would have voted to undelete had I seen this before the question was undeleted. That being said, it is a pretty low quality question, and would like to now nominate it for closure and (if it is not improved) eventual deletion. – Xander Henderson Nov 12 '18 at 23:26
• @XanderHenderson Agreed and updated the status of my answer. – GNUSupporter 8964民主女神 地下教會 Nov 13 '18 at 1:27
• It is inconceivable this question is undeleted. Even the answer is pretty low-quality. – YuiTo Cheng Jun 26 '19 at 4:53
• I find that revision history really surprising : one (now removed) user voted to undelete and then close the question, OP initially self-deleted the question but 5 days later voted to undelete after the second deletion, and now you've voted to undelete and then redelete the day after. Pardon my French, but WTF? – Arnaud D. Jun 27 '19 at 9:31

Undeleted, reopened

Please consider undeleting and reopening this post:

where OP gave his/her thoughts:

Honestly I have no idea about how to approach this problem. I tried the expansion of $$\sin x$$ on the left hand side and then expand $$\cos x$$ on the right but end up with a mess. Then again $$\cos x=(\sin x)'$$, but by converting each term on the right hand side into derivative of sine does not give any sensible identity to draw out something. Really out of ideas on this one. Is there any way to do this? Please give me some hints. Thanks for your time.

Undeleted, deleted, undeleted, reopened, closed as duplicate (mod)

Please consider undeleting this post: 2011 IMC Section A Problem 3

This is not an ongoing contest problem. The answer is known online. @Aqua's answer (with 14 net upvotes) is a useful one.

• Poorly explained answer. Had downvoted it back then. – quid Jul 6 '19 at 19:53
• That was a really bad excuse for deletion. – Jack Jul 6 '19 at 21:09
• Since I did not delete it, I don't need any excuse (and I doubt the delete-voters where aware of my voting back then). Please do not write comments that might suggest otherwise as not everybody can check it easily. – quid Jul 6 '19 at 22:20

Undeleted, deleted, undeleted, deleted, undeleted, reopened

Please consider casting the final undelete vote and reopening this post:
Evaluate $$1+2-3-4+5+6-7-8+\cdots+50.$$

This question is well written and with effort. It has very well written answers, one of which gives a generalization of the problem.

Undeleted, deleted, undeleted, reopened

Please undelete On a colon ideal in the polynomial ring $\mathbb R[x,y]$ because this question has got a score of 2 after OP included his/her own thoughts on the problem. This algebraic geometry question might add value to the main site.

• Selfdeleted without answer. No need to undelete. – quid Feb 25 '19 at 9:16

Undeleted, redeleted, re-undeleted, redeleted, undeleted

Please consider undeleting the question: The asymptotic behavior of $$n\ln n -n$$

• Well, I'd consider something in the spirit of the comment as the best answer there. Anyway given the complete lack of context it's hard to know which type of answer would be useful, whence the voluminous list. Also all standard likely on the site in similar form tens if not hundreds of times. At least one answerer made the effort to link it to related posts. – quid Jun 6 '19 at 22:37
• Redeleted (6/17/19) by a same group of users. One initiated three times the delete votes and one voted three times to delete this post. – Jack Jun 17 '19 at 22:01
• Probably I should have refrained of posting an answer there - however at the time when I posted there were some answers already and they seemed (to me) more complicated than needed. I have also included links to some other questions - you can see that similar questions are on the site (and they have similar answers). I will also say that when posting the answer I was fully aware that the question is likely to be closed/deleted. – Martin Sleziak Jun 18 '19 at 17:35
• @MartinSleziak: I believe "closing" is enough for this particular post. I strongly disagree with the deletion considering the high qualities of answers. Such good contents will be useful for future readers (this is closed post is not some stupid trivial textbook exercise) and should be preserved on the site. – Jack Jun 28 '19 at 12:22
• @Jack Well, several discussions here on meta suggest that when deciding about closing (and probably also deleting), most users take into account mainly quality of the question (and do not look at answers). Since you have mentioned that you care about preserving context, I should specifically point out that my answer contains some links to other posts which use Stol-Cesaro. Will Jagy reposted his answer in another thread. (For obvious reasons, I might be a bit biased in this particular case.) – Martin Sleziak Jul 6 '19 at 17:55

Please consider undeleting this post: Integral $$\int_{0}^{2\pi} \ln (2\sin(\frac{x}{2}))dx$$

Whether the asker should articulate more details in "I've tried some substitutions" could be debatable for reopening the post; I do not think it should be deleted. There have been two answers, one of which has 11 upvotes.

• The question was on hold for a week without modification before it was deleted. The answers are fine, but standard, and don't rise to the level of exceptional. I see no reason to undelete this question. The asker clearly got what they wanted, and I don't see that question providing any lasting value to the site. – Xander Henderson Jul 2 '19 at 0:46
• The lasting value to the site, like many other posts, is that there are two good answers to a tricky calculus question, which is not only useful for the asker but also future readers. – Jack Jul 2 '19 at 1:48
• The first part of your reply to me does not contradict what I said: you say that there are two good answers, I said that there are no exceptional answers. As to use to future readers: I disagree. This is a specific integral which can be analyzed using relatively standard techniques. The question itself is not terribly searchable (it is only going to come up if someone wants to deal with that specific integral (e.g. they are assigned the same problem as a homework exercise, and are trying to cheat), and the answers are not of any general interest (they are standard, but not general). – Xander Henderson Jul 2 '19 at 1:53
• Disagree. "This is a specific integral which can be analyzed using relatively standard techniques. ... the answers are not of any general interest " does not justify the deletion. MSE is not MO: most, if not all, of questions here "can be analyzed using relatively standard techniques". For instance, this recent question that has two good answers, the accepted one written in detail nicely by you, is a rather "standard" one. I would certainly not vote to delete such posts. (In case of any possible confusion: this is NOT sarcasm.) – Jack Jul 2 '19 at 2:48
• It is funny that you pick that example. I downvoted that question, and voted to close it. It was not closed, and the other answers were, in my opinion poor answers (as they failed to address the key point, which is that an induction proof is needed somewhere). If the question is not going to be closed and deleted, it should at least have a correct answer. I would still be happy to see that question closed, and would not object to its deletion---my answer is nothing special, and doesn't (IMO) rise to the level of exceptional. – Xander Henderson Jul 2 '19 at 2:56
• Moreover, applying standard results to a specific problem is very different from demonstrating the correctness of standard results then leaving it to the reader to apply that result to their specific problem. – Xander Henderson Jul 2 '19 at 3:01
• Well, (1) I have done my proposal for undeletion. Readers can make their own decisions. (2) I will object strongly the post I just mentioned being deleted, considering the quality of your exposition and egreg's good answer. (How do you find the review history by the way?) (3) ... have to leave now. – Jack Jul 2 '19 at 3:13
• Probably a duplicate of one or more of math.stackexchange.com/questions/815762/… and math.stackexchange.com/questions/889902/… and math.stackexchange.com/questions/679233/… and math.stackexchange.com/questions/2656431/… and also comes up in any question containing the name "Clausen". – Gerry Myerson Jul 2 '19 at 3:20
• @Jack To find the review history I go to the timeline of the post and then click on the link to the review event there. I don't know if there's a quicker way. – Brahadeesh Jul 2 '19 at 6:41
• @GerryMyerson: having read your links one by one, I would probably not called the post a duplicate of those, although they are related to the Clausen function. (Never known this before, thanks for mentioning it.) – Jack Jul 2 '19 at 11:47
• @Brahadeesh: Thanks for that. One can indeed use math.stackexchange.com/posts/3143084/timeline – Jack Jul 2 '19 at 11:56
• It's funny how those who voted to close/ delete are here on this site for a while, and even claim to know that the question is easily searchable. Yet, instead of trying to mark it as duplicate, they simply delete it. Also it's quite bold for a single group of people (CRUDE users) to decide that it has no value for this site. – Zacky Jul 22 '19 at 8:50
• @XanderHenderson I wrote above in the third person since you're not the only one who believes that, but since you commented it here, can you please tell me why haven't you tried to mark it as duplicate (if it's easily searchable) and simply decided to remove the content? (maybe there's a reason that I'm missing). – Zacky Jul 22 '19 at 8:58
• -> Before voting to delete, please check whether there are any good answers; if so, then the question should be flagged for moderator attention as a potential merge candidate. We don't like to lose great answers!. And the answers provided there are definetly good. Thus those who deleted it violated the "rule" that I copy-pasted. // A little off-topic, but I hope that you are aware that who asked the question couldn't care less if the question is deleted since he/she already took the informatio needed. Thus by deleting the question, it even helps that user instead of penalizing them. – Zacky Jul 22 '19 at 14:00
• -> Of course, the posts around here aren't only for those who asked, but for the whole community. I fail to see why there ins't a way to penalize the users (for example a "question ban" if the questions previously posted are bad), but instead the decision that CRUDE users took is to penalize the whole community by erasing good content. Anyway, it's pointless if I type here in the comments, soon I will try to make a meta post about something related to this. Thanks for your time and have a nice day! – Zacky Jul 22 '19 at 14:12

Undeleted

Please undeleting this post: How to prove that $$\frac{e-1}{2e} \le \int_0^1 \frac{e^{-x}}{1+x}dx \le \ln 2$$

OP did have his/her own attempt. This is not a zero-effort trivial question, which should not be deleted.

Please undelete this post: $$n^4 + 4^n$$ is a not a prime

OP clearly states context for his/her question:

This question appeared in the undergrad entrance exam of the Indian Statistical institute.

When $$n$$ is even the proof is simple. For $$𝑛=2𝑚+1$$ I am utterly stuck.

True that this is a duplicate of some previous posts, but duplicate can be useful. Moreover, it is not necessarily easy at all to identify this question as a duplicate:

• The useful searching engine Approach0 is NOT well known, neither it is mentioned on the page of help center of MSE.
• A quick search of the expression $$n^4+4^n$$ on the MSE searching box returns something irrelevant:
• If one posts this as a new question: the "similar questions" box does not show any one of the duplicate:

"Questions that are extremely off topic, or of very low quality, may be removed at the discretion of the community and moderators." This 5 upvoted one with three answers is not.

• At some point, every math student really ought to be shown the factorization of $x^4+4$. – Gerry Myerson Sep 26 '19 at 7:47
• This is an umpteenth reincarnation. Even in 2013 when André Nicolas answered it we had already covered it many times. Also, while duplicates were seen as somewhat useful back in 2013 (when Jeff Atwood's strangedupe comment was often cited), the site has moved on since. The most recent word from above (don't remember for sure whether it is from JA or the current CEO Joel Spolsky) reads: Over time duplicates become vast landmine fields. – Jyrki Lahtonen Sep 26 '19 at 16:24
• The sentence ("... landmine fields") Jyrki mentioned is from this article by Jeff Atwood. That one is specifically talk about StackOverflow, which is sort of the counterpart of MathOverflow. (cont.) – Jack Sep 26 '19 at 17:18
• Jeff explicitly writes in that article the following : But I will point out that there is plenty of precedent on the Stack Exchange network for splitting sites into "expert" and "beginner" areas with slightly different rulesets. We've seen this for Math vs. MathOverflow, English vs. English Learners, Unix vs. Ubuntu... perhaps it's time for a more beginner focused Stack Overflow where duplicates are less frowned upon, and conversational rules are a bit more lenient? – Jack Sep 26 '19 at 17:18
• I am not following SO much at all, but what little I have seen of it it is nowhere near the level of sophistication of MathOverflow (admittedly my observations are likely biased). But I would support walling off lower level math (like freshman and below) to a Math Learner site. – Jyrki Lahtonen Sep 26 '19 at 21:49
• I don't get what's the contradiction even. Certainly duplicates will happen, some will be caught other won't be caught. Of those that do get caught we'll keep some that seems relevant as "sign posts" and we remove the rest without much ado (either way). Why would we want to keep them? – quid Sep 26 '19 at 22:26
• On search, searching n^4 + 4^n for works like a charm Why would one use strange spacing, or in any case just check one version, and include the completely irrelevant dollars? – quid Sep 26 '19 at 22:34
• @quid: your linked search of n^4 + 4^n , which does return a duplicate result, uses "strange spacing". If one searches n^4+4^n without the spacing before and after the plus sign, one would not see the charm. – Jack Sep 27 '19 at 0:04
• The answers are all dupes of answers given many times in the past. This FAQ occurs many times every year. There is no need to keep adding duplicate answers every time it reoccurs. Doing so makes it difficult if not impossible for users to locate the most enlightening answers. – Bill Dubuque Sep 27 '19 at 0:45
• @Jack I forgot to add that Theoretical Computer Science is the StackOverflow analogue of MathOverflow. Don't get mislead by the inclusion of the word Overflow. If SO walls off a learners' site, we should do the same. – Jyrki Lahtonen Sep 27 '19 at 3:42
• And also, the voting already gives low level math an unhealthy advantage in the gamification aspects of the site. Simply because users are obviously not going to (and should not) vote on material over their head. You wanting to be more lenient about low level duplicates would exacerbate an already serious problem. – Jyrki Lahtonen Sep 27 '19 at 3:45
• Well, let's forget about which spacing is strange or not. One might learn the lesson that one should search for both variations. I'd still maintain that the spacing there is the more natural way to type it. But I am glad that you seem to agree now that the dollars are useless. // And even if it was completely unnatural it is the very spacing that was used in that post that you want undel too. Thus at least that user likely would have used the same spacing if they had searched and keeping this as a dupe would not even help future searches (except maybe via answer, but then merge could do). – quid Sep 27 '19 at 8:44

Reopened

I propose reopening Has Gödel’s second incompleteness theorem been formalized?

The question simply asks whether there is a computer-verified version of the proof of the theorem. This strikes me as a perfectly reasonable mathematical question, and I can't see why anyone would vote to close it, much less delete it (there are currently two votes to delete).

Full disclosure: I posted an answer (the only answer) to the question, which OP has accepted. The answer attracted a downvote – I'm guessing that was done to make it easier to close and delete the question, since I can't see what objection anyone could have to the answer.

Update: the question was never reopened, and has now been deleted.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

The close notice for How to prove that the permanent of a doubly stochastic matrix is positive? says, "Add details and clarify the problem being solved. This will help others answer the question."

The problem being solved is perfectly clear (to anyone who knows what a doubly stochastic matrix is, and what the permanent of a matrix is), and others have not needed any help answering the question, so the close notice strikes me as invalid. Please consider voting to reopen this question.

• Possibly you did not get the memo: math.meta.stackexchange.com/questions/31147/… – quid Mar 5 at 15:31
• @quid if a user is going to vote to close a question, and if none of the currently available close reasons applies, I reckon the user really ought to leave a comment explaining how the question doesn't measure up. What was done for this question, even if OP clicked to see the further information on "add details and clarify," gives OP no clue as to what to do. Heck, it gives me no idea as to what the close-voters actually had in mind. Let's reopen the question, and give the close-voters the chance to make their case. – Gerry Myerson Mar 5 at 21:30
• Maybe that would have been better but there is only so much time and it fits well enough. As for you, it is hard to believe that you actually had not understood what the matter was (as opposed to disagreeing). Either way, I hope you keep the information obtained here in mind going forward. – quid Mar 6 at 4:36

I nominate https://math.meta.stackexchange.com/q/29570/290189 to be undeleted because this meta question contains moderator's feedback to deal with serial downvotes.

• What information is in that post that is not in the FAQ? Also as it was auto-delered it'd be redeleted. – quid Feb 9 '19 at 12:46
• @quid That post provides real examples of questions being serial downvoted. – GNUSupporter 8964民主女神 地下教會 Feb 9 '19 at 12:48
• How is that useful? – quid Feb 9 '19 at 13:14

Deleted, undeleted, redeleted and merged with another question

I request the undeletion of this question (on denesting $$\sqrt{a-b\sqrt{c}}\,)$$

Reason: I asked this question, and it turned out to be a duplicate. However, this doesn't deserve deletion as this question contains a crucial formula that is a very useful one. It is very useful to me, and it is sad for me to see that the community is not able to access it anymore. Please undelete this question.

• The answers there are dupes of the answers in the linked dupe thread (and many others - this is a FAQ). I see no reason to further such rampant duplication. – Bill Dubuque Mar 1 '19 at 1:03
• @BillDubuque there is a useful formula. Perhaps if you can transfer the answer to the other question?? I find it really useful. – Max0815 Mar 1 '19 at 1:04
• That well-known formula is already in Frank's answer in the dupe (and many, many other answers here). Moreover, he derives if instead of pulling it out of a hat as in the answer in your thread. – Bill Dubuque Mar 1 '19 at 1:06
• @BillDubuque how is it derived? even if so, the other answer on my question has a basic method that is not included in the other question. – Max0815 Mar 1 '19 at 1:08
• @BillDubuque oh, right. – Max0815 Mar 1 '19 at 1:11
• I don't understand why this question was deleted. It seems to me that the only reason is that it is a duplicate. I do not believe that this is a reason to delete duplicated (and this was discussed recently here). – user1729 Mar 7 '19 at 13:10

I would like to see this question undeleted and mark as duplicate but keep it alive on the network.

Also, I object to the deletion since although the questions are looking for the same thing, I must mention that they are not word by word duplicates and the context also seems a bit different. Also, the answers are not duplicates (except one which coincidentally was answered by the respective OPs of both questions).

• This question was deleted by a moderator, which means that only a moderator can undelete it. As such, there is pretty much nothing that anyone here can do for you. – Xander Henderson Apr 5 '19 at 17:50
• @XanderHenderson I posted this on meta. Someone asked me to post here (just to be shot with 3 odd downvotes here ) – tatan Apr 5 '19 at 18:54
• Votes on meta do not mean the same thing that they mean on the main site. A downvote means "I do not agree with this statement." I would interpret the downvotes here as an indication that the community does not want to reopen / undelete your question. – Xander Henderson Apr 5 '19 at 20:50
• @Aloizio Macedo can you please give some reasons on why you single-handedly deleted the question? (as it stands it looks like an abuse of power, but maybe there'a reason that I'm missing) – Zacky Jul 22 '19 at 9:16

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.

• Standard solve-my-problem-without-me post, and nothing spectacular about the answers. I oppose undeletion. – user296602 Jun 3 '19 at 10:29
• @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. – peterh - Reinstate Monica Jun 3 '19 at 10:38
• 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. – user296602 Jun 3 '19 at 10:44
• @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? – peterh - Reinstate Monica Jun 3 '19 at 10:47
• 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. – user296602 Jun 3 '19 at 10:51
• @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. – peterh - Reinstate Monica Jun 3 '19 at 10:54
• 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!). – Jack Jun 3 '19 at 11:55
• @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. – user296602 Jun 3 '19 at 12:15
• @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. – Jack Jun 3 '19 at 12:48
• I'd like to remind everyone to keep it civil. – Asaf Karagila Jun 3 '19 at 15:17

This question on Laplace Transform has been deleted for no real reason. OP has showed some of his work. So there is no reason to delete this topic. Vote to undelete. Thanks.

We still need a single vote to undelete. Thanks in advance.

Laplace Transform $$\left(\frac{\cos \sqrt t}{\sqrt t}\right)$$

• (1) The user presented two problem statements, not a single question. (2) The user did not (contrary to your assertion) demonstrate any work---they claimed to have done some work, but did not actually demonstrate any of that work. (3) The user provided no other context, such as a source for the problem, basic definitions... anything, really. (4) Finally, it is poor form to ask for undeletion of a question which you have answered without disclosing your interest in the problem. You are not an impartial third party, as you stand to benefit from the undeletion. – Xander Henderson Apr 5 at 3:33
• Op said he used power series to solve one of the question but couldn't solve the second one . Both questions are related as I have shown in my answer. @XanderHenderson – Aryadeva Apr 5 at 3:36
• (1) "Serie" is not a word. (2) The user claims to have done a thing. That doesn't mean that they have demonstrated that thing. Claiming to have done a thing does not provide any context for the problem. (3) So what if the problems are related? The user did none of the work necessary to demonstrate that relation. The "question" is presented as two isolated problems. It is the job of the asker to explain how the problems are related; it is not the job of the answerers to provide that context for the asker. – Xander Henderson Apr 5 at 3:39
• I meant OP used power series. I hope it's more clear. – Aryadeva Apr 5 at 3:40

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.

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.

• 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. – Gerry Myerson May 24 '19 at 2:47
• 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. – user296602 May 24 '19 at 6:42
• 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. – peterh - Reinstate Monica Jun 1 '19 at 17:00
• 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 – Jack Jun 1 '19 at 17:16
• @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. – Xander Henderson Jun 1 '19 at 17:28
• 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. – Asaf Karagila Jun 1 '19 at 17:28
• @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. – Jack Jun 1 '19 at 17:30
• @quid I was impressed on them. It is subjective. But their score is objective. – peterh - Reinstate Monica Jun 1 '19 at 17:45
• 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' ". – Jack Jun 1 '19 at 17:51
• @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. – Asaf Karagila Jun 1 '19 at 17:54
• @Jack so how about you respect others views or at least the rules of the site. – quid Jun 1 '19 at 17:54
• 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. – Asaf Karagila Jun 1 '19 at 17:57
• @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. – quid Jun 1 '19 at 18:15
• @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. – peterh - Reinstate Monica Jun 1 '19 at 18:44
• @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. – quid Jun 1 '19 at 20:04
• @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. – quid Jun 1 '19 at 21:53
• 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. – Martin Sleziak Jun 3 '19 at 5:16

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."

• 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. – Xander Henderson Sep 30 '19 at 19:00
• 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). – Xander Henderson Sep 30 '19 at 19:06
• 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. – Xander Henderson Sep 30 '19 at 19:11

I think we need to open the following Mike Lyons's answer: The smallest value of $$x^2 + 5y^2 + 8z^2$$ such that $$yz+zx+xy=-1$$

I think it's a beautiful and right answer. We need to redact it only.

It was my mistake to delete this answer.

• Note that the question has since been deleted. – Gerry Myerson Oct 9 '18 at 22:27

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.

• 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. – Xander Henderson Jun 1 '19 at 16:39
• 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. – Xander Henderson Jun 1 '19 at 16:42
• 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. – peterh - Reinstate Monica Jun 1 '19 at 17:03
• @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. – user296602 Jun 1 '19 at 18:14
• @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. – peterh - Reinstate Monica Jun 1 '19 at 18:33
• @T.Bongers From here: "Before voting to delete, please check whether there are any good answers; [...] We don't like to lose great answers!" – peterh - Reinstate Monica Jun 1 '19 at 18:34
• @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. – quid Jun 1 '19 at 18:46
• @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. – user296602 Jun 2 '19 at 3:41
• @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. – peterh - Reinstate Monica Jun 2 '19 at 3:53
• @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. – peterh - Reinstate Monica Jun 2 '19 at 5:18
• @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 – peterh - Reinstate Monica Jun 14 '19 at 11:30
• @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. – peterh - Reinstate Monica Jun 14 '19 at 11:31
• @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. – peterh - Reinstate Monica Jun 16 '19 at 6:52
• @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. – peterh - Reinstate Monica Jun 16 '19 at 9:47
• @GNUSupporter8964民主女神地下教會 Oh yeah, of course "no revenge"... – peterh - Reinstate Monica Jun 17 '19 at 8:59