# Questions tagged [support]

You need help with the use of one or more of the site's features.

420
questions

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### undelete a post

Is there any possibility of undeleting a post? I know it was closed years ago as not MO level. So maybe it could be undeleted and then moved to MSE? Just because it hosts a discussion which is ...

3
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1
answer

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### Getting list of users ordered by date joined

Back in the old days before we moved to the current stackexchange platform, you could list users sorted by their user number. Is it still possible to get such a list? I'm trying to remember an old-...

3
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1
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### Why does revision 5 of MO120096 look empty?

I recently came across Andrea Mori's question Explicit Casselman theory: reference needed. The comments 1 2 make reference to matrices rendering poorly, and then being fixed, and I was curious what ...

0
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2
answers

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### How is it possible to format a right-aligned sequence that has single and double digits so that the alignment is correct?

I have this MathJax sequence that I want to format properly in MathOverflow:
$$S_m =
\begin{cases}
\begin{aligned}
1, \quad\text{for m=1}\\
12, \quad\text{for m=2}\\
123, \quad\text{for m= 3}\\
...

5
votes

0
answers

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### Is there a way to recover old account without email?

I would like to recover my account
https://mathoverflow.net/users/2029/andrey-gogolev
I don't seem to remember the email associated to it. Even if I did I probably don't have that email address ...

5
votes

1
answer

104
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### Account merging

I have an issue with account merging form in the help center. The 'Your other profile link' does not accept any link to the second my account.
Picture 1: Completed help form
Picture 2: Outcome of ...

12
votes

1
answer

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### How to recommend that a question is better suited for another SE site that isn't listed in the close reasons?

Today I found MO questions where commenters recommended that Proof Assistants or History of Science and Mathematics would be preferable to MO. Other better placements I remember include Mathematica, ...

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vote

0
answers

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### There is no any answer box for this post

I would like to add an answer to this question but there is no any answer box for this question.
What is the reason?
Nonequivalent definitions in Mathematics

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votes

1
answer

204
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### Is asking to verify my P=NP proof appropriate?

Is providing link to my (8 pages) proof of P=NP and asking to check my proof appropriate for a MathOverflow question?
The proof is on professional mathematician level (uses advanced logics) and does ...

6
votes

0
answers

221
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### FirefoxCP Isolated Web Content CPU overdrive

Just recently, MathOverflow has started to cause Firefox to use massive CPU resources, at least on my machine. In particular, I'm on a Macbook Pro 2.3 GHz 8-Core Intel Core i9 running Ventura 13.4.1 ...

2
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0
answers

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### How do backticks, escaped backticks, and math mode interact, in posts and comments?

I know I can escape backticks, like `.
I though I could escape backticks within backticks, as I did in a comment, but it's not working here: a\b`. See a comment ...

2
votes

1
answer

110
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### Writing a bar on top of a number

I want to write a question in which I have a bar on top of a number or letter to represent a recurring digit. however, I can't find any options to write the particular digit, even when I search the ...

2
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1
answer

100
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### Custom filter is stuck on

I had a custom filter for questions in tag co.combinatorics with no answer. It seems to be "stuck" in the sense that if I go to the "generic" page for that tag, https://...

2
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1
answer

344
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### How can I improve my posts to attract responses?

This is a follow up to this post:
I haven’t received a response from either this or this post, since, according to @Asaf Karigila:
"The longer, more detailed, more effort that is required to ...

1
vote

0
answers

91
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### Making my post easier to read

I tried to make this post easier to read but find it extremely difficult to get through grammatical-wise.
I'm wondering if there is someone who can correct the grammar of this post or rewrite the ...

5
votes

1
answer

162
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### My gravatar has changed

My automatically generated Gravatar has changed. Is that normal? I thought they were supposed to be permanent. I used to have a purple pattern IIRC, now it is light blue, a color I have never seen. It ...

17
votes

1
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560
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### imgur will remove some content soon. Does MathOverflow need to save images?

It has been reported that "Hosting site Imgur will remove explicit and anonymous content next month". Are there possibly some images linked in MathOverflow questions or answers, attached to ...

4
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1
answer

209
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### Looking for an answer (written by Thurston = user9062)

I recall that Thurston answered a question, showing that a particular graph braid group is the fundamental group of a three-manifold. I even recall that the answer proved that the three-manifold was ...

3
votes

2
answers

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### Can’t vote to close question as duplicate of question without an answer

I tried to vote to close Einstein problem; on mirror symmemtry as a duplicate of Aperiodic monotile without reflections?. But the software gave me an error I wasn’t expecting: it said because the ...

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votes

2
answers

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### Is there a penalty for merely looking at a question, comments and an answer?

Recently I have lost 2 reputation points for merely looking at a question, comments and an answer (1 point for reading the question "Large cardinals in $ZF$ + $DC$ + $AD$, and 1 point for reading ...

23
votes

1
answer

752
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### Update on "Who owns my MathOverflow posts?"

I saw the question previously asked in:
Who owns my MathOverflow posts?
Unfortunately, I was not able to get a clear answer by reading the responses to that question, as other people had commented ...

3
votes

1
answer

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### Can I see my flaggings?

Is there anywhere a list of questions, answers or comments that I have flagged?
I believe a list of such, together with my explanations why did I flag this, should be available, but I could not find ...

2
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0
answers

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### Would undeleting questions increase the positive question record?

I came to know that to have a positive question record the total number of questions (including deleted ones) must be at least double the sum of (deleted, downvoted, and closed) questions.
If a ...

0
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0
answers

127
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### Gaining points for posting

How do I earn 50 points to comment if I am not allowed to comment or post? So my problem is as described as far you can see.

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0
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206
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### What is the status of the imgur images on MathOverflow?

Many posts on MO contain a link to imgur.com. Such links can be created outside the Stack Exchange network - if somebody simply creates a picture on imgur. But some of them might have been uploaded ...

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0
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### Did mathcal stop working properly?

Does this question Basic algebra of $\mathcal{O}_0(\mathfrak{sl}_n(\mathbb{C}))$ — Reference request look like this for anyone else?:
Those squares are supposed to be \mathcal{O}'s. As far as I can ...

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votes

1
answer

250
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### What is a supported use of \hfill?

According to Supported TeX/LaTeX commands, \hfill is supported. However, as expected, it doesn't work in ordinary text \hfill ; and using it in math mode seems to ...

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1
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### Interesting question deleted by author — how to reach out to author to ask to undelete?

"Coloring Gaussian integers based on a numeral system based on powers of $-1+i$" was an interesting question that was recently asked. I left a comment with some relevant keywords and links (...

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1
answer

81
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### Long post fails to render

In one MathOverflow answer by me, the MathJax code added latest fails to render correctly. Instead, one $ tag is ignored and for the rest on the line, code inside <...

6
votes

1
answer

166
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### How to find highly upvoted comments?

My question is simple: is there a way to find the most highly upvoted comments on mathoverflow?

3
votes

1
answer

227
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### Is there a way to `@` exactly one of two users whose names differ, if at all, only by whitespace?

I recently approved an edit to Zeroes of characters of general linear group induced from certain characters of parabolic subgroups by user @math seeker. I approved the edit, which was otherwise ...

4
votes

1
answer

484
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### Hyperlink in a comment?

How do I add a link to an external published article in a comment? I don't see the edit frame with the link button. What is the syntax I can use? (I did search Meta but did not see ...!)

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4
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### Is it possible to see the source for a comment?

Although this question seems to be new to M.MO, @MartinSleziak points out several related posts on Meta.MSE.
I was curious about the diagrammatic magic of @YaakovBaruch's recent comment, and so ...

5
votes

1
answer

161
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### Serial voting was reversed

I was recently noticed "serial voting was reversed" on MO. I am curious about how this works, and what this exactly means (I don't have the feeling that I did something wrong).
Note that I ...

5
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0
answers

151
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### Can we recover old MathOverflow Meta "Tea" discussions?

Today I flagged a question as needing to be made community wiki. I thought about why, and found this old question of mine here. Carlo Beenakker helpfully linked to a thread on the old tea. Link ...

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563
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### Was the custom close reason mentioning Math.SE removed?

For a long time, these two custom close reasons used to be available:
This question does not appear to be about research level mathematics within the scope defined in the help center.
MathOverflow ...

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0
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### My closed question was never reviewed to be reopened

Two weeks ago I posted this question: What is a good formalization of this classic math puzzle?
The question was closed within hours (presumably based on a misunderstanding), I made some edits a few ...

4
votes

1
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273
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### Mystery popup window

Last week or so, when I get into an SE site (MO in particular), a popup window appears in the lower left corner for few milliseconds. Some kind of clickable button there, with not enough time for me ...

9
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### Editing old question, can't submit as title is too long

I'm editing Is there a canonical map from the cohomology of orbifold Chiral de Rham on an orbifold to the cohomology of Chiral de Rham on a crepant resolution? as there was a broken arXiv Front link (...

8
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1
answer

473
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### `\intertext` in MathJax

MathJax, at least as used on MO, recognises many multi-line environments, like {multline}, {align}, and ...

3
votes

2
answers

189
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### MathJax equivalent of `<strike></strike>`

I recently tried to edit an old question x-th moment method that had got bumped to the front page for other reasons. The post had an equation that was meant to be, and maybe at one point was, struck ...

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1
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### Best way to correct "Cauchy-Schwarz" misspellings

I would like to apologize because the top questions page is currently overrun by questions I just edited.
I just noticed that Cauchy-Schwarz is often incorrectly spelled Cauchy-Schwartz and so I made ...

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1
answer

108
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### How to formulate a question for a Mathoverflow forum?

Can the following question be posted? “Where could an error be in the proposed proof of Fermat Last Theorem? Info about the author, proof and preliminary validation is at (link)”. How should the ...

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votes

4
answers

814
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### What is the deal with changes to the front page?

It appears that today Stack Exchange has changed the appearance of the MathOverflow front page. It now looks more similar to Stack Overflow. The most noticeable change is that the counts of answers, ...

3
votes

1
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### How does one check progress towards a (second) Socratic badge?

Not to take anything too seriously, but how does one check progress towards a (second) Socratic badge? I've seen a script for another Overflow site, but it doesn't seem to work here.

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### Top-voted questions for the year?

This link shows the top-voted questions:
https://mathoverflow.net/questions?tab=Votes
In a New Year's spirit,
how can I restrict this query to top-voted ...

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0
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162
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### How can I contact a specific user

I'm new here and it was suggested to me to ask this here. There was a particular user who's answers and questions came up more than once when researching a couple math related topics and I was hoping ...

2
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1
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### Is it possible to find out why a comment was deleted?

I had a comment at How do you generate math figures for academic papers? asking whether the question was a duplicate. (Carlo Beenakker is responding to it in this comment.) Since the comment is no ...

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1
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### Are my comments searchable?

My activity page in particular contains "All actions" tab; all my comments are there. Can I search for, say, a specific word there?
A wonderful answer by Martin Sleziak to my question Is it ...

2
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0
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### How do I recover my MathOverflow account?

I've been inactive for close to a year due to illness--and want to resume my activity as in
Euclidean volume of the unit ball of matrices under the matrix norm
but when I try to do so, I get treated ...