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6 votes
4 answers
1k views

Formatting Sandbox

The purpose of this thread is to enable people to check if their formatting works and to play around with their MathJax code. Quoting from Bill Dubuque's Formatting Sandbox on meta.math.SE: To use ...
5 votes
1 answer
121 views

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 ...
4 votes
0 answers
219 views

I don't succeed in hiding paragraphs using >!

I found here in the spoilers paragraph that putting >! would hide the following things, which was a way for me to alleviate a question's heavy presentation by hiding paragraphs that could be seen if ...
16 votes
1 answer
479 views

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 votes
1 answer
179 views

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
86 views

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 ...
-4 votes
2 answers
302 views

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
710 views

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
127 views

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 ...
18 votes
1 answer
593 views

Influx of ridiculous number of spam users – what to do?

There is currently an absolutely ridiculous influx of spam user profiles: almost the entire "recent badges" section in the right-hand column of the main page is full of Autobiographer badges ...
2 votes
0 answers
87 views

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 ...
4 votes
2 answers
310 views

How to wear my Winter bash hat

I have noticed a link on my Mathoverflow page linking a webpage that explains an event called Winter bash. I have earned already earned some hat which I am using on different stack exchange ...
0 votes
0 answers
125 views

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.
25 votes
25 answers
3k views

Help cleanup tags!

This is meant to agglomerate tags that need (occasional or regular) cleanup. That is tags that mean multiple unrelated things and need to be separated into more specific tags. Please follow the ...
11 votes
0 answers
168 views

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 ...
17 votes
24 answers
3k views

Help improve tagging!

Please help by writing tag wikis for your favorite tags! Use answers to this post to suggest tag synonyms. Finally, if you're a 10k+ user, note how easy it is for you to edit tags now!
4 votes
2 answers
174 views

Removing "tag-removed" tag

Currently, contra its intention the "tag-removed" tag has more than $300$ associated questions, many of which are upvoted and have actually contentful tags. This seems like a situation ripe ...
6 votes
1 answer
1k views

Registered vs. unregistered users?

What does it mean if a user is unregistered? I'm interested in the questions and answers of a particular user, let's say "SAM". I clearly see questions that SAM has asked, but when I search for "SAM"...
11 votes
0 answers
595 views

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 ...
6 votes
1 answer
3k views

What happened to the stack exchange app for iOS?

The stackexchange app would no longer launch, I tried to reload it from the Mac App Store, and it’s not there (or at least, I could not find it). I probably missed some event, is there an alternative?
7 votes
1 answer
470 views

JavaScript loading problem

In my hotel in Shanghai, I get the error message MathOverflow requires external JavaScript from another domain, which is blocked or failed to load. Is there a work around for this? Posts load very ...
8 votes
1 answer
169 views

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 (...
5 votes
1 answer
151 views

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 ...
6 votes
2 answers
2k views

Numbering and cross referencing of equations in questions and answers

A basic LaTeX feature which I sometimes miss when asking and answering questions in MO (specially when the question and the particularly the answer are longer) is the possibility of numbering ...
31 votes
111 answers
12k views

Requests for reopen and undelete votes for closed and deleted questions

Since I expect this may prove rather useful, I'm blatantly purloining Asaf's question from meta.math.se. Please post general requests for reopen votes as answers below. Beware that "short" ...
1 vote
2 answers
718 views

Triangle commutative diagram does not work here at MO

I frequently tried to draw a triangle commutative diagram similar to the definition of projective modules for this question. A module associated to an endomorphism of a vector bundle so I ...
24 votes
4 answers
796 views

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, ...
1 vote
1 answer
81 views

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
152 views

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 views

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
281 views

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 ...!)
10 votes
4 answers
277 views

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
152 views

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 ...
12 votes
1 answer
555 views

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 ...
4 votes
0 answers
145 views

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 ...
9 votes
1 answer
262 views

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 (...
2 votes
1 answer
169 views

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 ...
3 votes
0 answers
180 views

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 ...
13 votes
1 answer
765 views

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 ...
7 votes
1 answer
311 views

`\intertext` in MathJax

MathJax, at least as used on MO, recognises many multi-line environments, like {multline}, {align}, and ...
7 votes
1 answer
360 views

Providing a way to sort one's favorites by "date added"?

It is nice to have so many ways of filtering and sorting the thousands of threads in MO. So there I go, and my list of favorites becomes longer and longer. Most often I obviously add rather recent ...
3 votes
2 answers
133 views

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 ...
-3 votes
1 answer
108 views

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 ...
20 votes
1 answer
863 views

What is MathOverflow's "agreement" with Stack Exchange?

On June 24, 2013, MathOverflow signed an agreement with Stack Exchange, Inc., to migrate the original site to the newer Stack Exchange 2.0 platform and join the Stack Exchange network. François G. ...
3 votes
1 answer
158 views

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.
10 votes
1 answer
1k views

Can I somewhere see my own deleted questions?

Don't worry, I won't try to sneakily repost them or otherwise bother anyone else besides me with them. I just felt like it would be nice to see what sort of questions I was thinking about a couple of ...
11 votes
1 answer
950 views

About if questions in Research papers can be asked on MathOverflow

I am new to MathOverflow. I am a master of mathematics student. I wanted to ask if questions in research papers ( regarding what I am not able to understand in the paper ) can be asked on ...
7 votes
1 answer
338 views

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 ...
2 votes
0 answers
152 views

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 votes
1 answer
150 views

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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