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22 votes
1 answer
210 views

Opt out of the new upvote/downvote buttons?

I guess most of you have noticed by now the new upvote/downvote buttons. This seems to be in line with all the other SE sites (though I admit I haven't checked each and every one of them). Does MO ...
4 votes
1 answer
67 views

Having the MO Mathjax parser recognise \( \) is a regex away

@IsabelBeckenbach discovered why \( \) isn't accepted as a math-mode delimiter on MO. I'd always thought it was a design choice, but apparently it's just a mis-...
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 ...
20 votes
1 answer
558 views

Policy toward GPT-generated conjectures?

The recent MO post, A number theoretic conjecture by Chat GPT, posed a conjecture that was generated by ChatGPT. In my opinion, it was not a particularly interesting conjecture. For me at least, the ...
2 votes
0 answers
74 views

Some arrows in commutative diagrams in comments are wrongly interpreted as @-notifications; and a bonus question about CDs on MMO

I left the following comment on Pullbacks in this category of vector spaces are intersections: Are the morphisms in your category isometries? Otherwise, I'm not sure why the category is left ...
0 votes
1 answer
218 views

Clarifying an answer that was deleted by moderators

I recently posted a controversial answer to a question, then spent a few days off site life-tending while things cooled off. When I returned with the intent of seeing how the controversy had been ...
7 votes
3 answers
423 views

What should we call a tag on point-free topology?

The tag currently used for point-free topology (aka “pointless” topology) is “locales”. I think the name is a bit restrictive: while writing this question (which, indeed, does not contain the word “...
52 votes
47 answers
27k views

News of potential interest to the MO community

Occasionally, there has been a suggestion to start a meta question to collect information that might be of interest to the MO community. This is an attempt to start such a thread. Is there any news ...
5 votes
1 answer
123 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 ...
9 votes
1 answer
332 views

On the tag [bitcoins]

Since several questions under the tag bitcoins have nothing to do with Bitcoin per se, but, rather, are related to proof of work, why not rename the tag cryptocurrencies or proof-of-work?
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
480 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 ...
132 votes
60 answers
19k views

Best of MathOverflow, or papers inspired by MathOverflow

This is a place to collect MathOverflow success stories! Was some of your research inspired by something on MathOverflow? Do you know questions & answers that led to interesting research? ...
24 votes
2 answers
756 views

Revisiting our policies on thank-you comments

Despite the little notice in the comments section telling us that comments along the lines of 'thank you' aren't welcome because they don't move the discussion forward mathematically, I have always ...
4 votes
1 answer
180 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 ...
25 votes
1 answer
3k views

Jean-Christophe Yoccoz

I've heard today that Jean-Christophe Yoccoz passed two days ago: Le mathématicien français Jean-Christophe Yoccoz, médaille Fields, est mort [archived], Libération, 05.09.2016. I think people would ...
10 votes
1 answer
231 views

Citation helper: can we have it automatically convert \(...\)s into \$...\$s?

Here is an example output of the citation helper in the case where the citation's title contains $\rm\LaTeX$ code (random paper found by searching for L^\infty) ...
6 votes
0 answers
70 views

The citation helper picks up a backlink to an MO answer when a DOI link is unavailable

In the citation helper, I searched for "Lectures on the approach to Iwasawa theory for Hasse-Weil L-functions via BdR". The unique result that shows up is the following (I've only edited two ...
6 votes
6 answers
691 views

I have a question which is a near fit for MathOverflow. What are some other resources I might consult?

What are some other resources which might be useful for somebody considering asking a MathOverflow question, especially if their question is not quite a perfect fit here? In asking this, I have ...
7 votes
1 answer
494 views

Repeated re-open/close votes (Tate conjecture)

The question Tate conjecture (Proved?) was asked yesterday, and quite quickly closed; it was then re-opened, and then closed (by, I think, a different set of 5). Questions about proofs of correctness ...
0 votes
0 answers
167 views

Difference between Mathematics SE and MathOverflow

If I post a question that I invented myself on Mathematics SE, I receive comments like "did you do homework?" and, eventually, "why do you ask if you know?". Fair enough. It seems ...
5 votes
1 answer
222 views

Long display style formulae extend too much to the right with some renderers

In the following screen capture, take a look at the region delimited by the red rectangle: notice how it extends too much to the right, such that a part of it becomes hidden by the yellow page element....
3 votes
1 answer
128 views

Spoiler mechanism not working

In a recent answer I've tried to hide some text. Unfortunately, something seems broken. Here's the not-so-hidden text: ! Let $X$ be the set of complete theories that satisfy "everything is ...
2 votes
0 answers
110 views

mathcal notation fails to render in Chrome

I recently noticed that "\mathcal" no longer renders. Example post but it renders fine in Safari Chrome: 111.0.5563.146 (Official Build) (x86_64) Safari: Version 16.4 (18615.1.26.11.22) ...
-3 votes
1 answer
233 views

Rule against asking the same question that was once asked in the past (on another forum, yet)

In its relatively early days, MO was an organic and dynamic website — it encouraged active discussion among its members, that in almost all cases was extremely fruitful. But now, even if a similar ...
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 ...
29 votes
3 answers
2k views

Celebrity usernames

The question "naive de Rham cohomology fails for singular varieties" (naive de Rham cohomology fails for singular varieties) recently received an apparently useful answer from a user with the name "...
-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 ...
0 votes
1 answer
359 views

MathOverflow in the classroom

My belief is that it is legitimate to cite some posts of the main site MathOverflow in the classroom of some course. Under this assumption I've wondered about the following question. I don't know ...
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 ...
20 votes
0 answers
303 views

Make edit history more accessible

Once a post has been edited once, there is a direct link to the revision history of the post that is visible to everyone as in this example: However, when a post has not been edited, this link is not ...
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 ...
25 votes
2 answers
816 views

Kitty can’t fix it — Old questions inaccessible for logged-in users, giving “unexpected error”

For the past few days, any attempt to access the question Collecting proofs that finite multiplicative subgroups of fields are cyclic results in an internal server error: It seems the poor kitten ...
4 votes
0 answers
66 views

MathJax in edited question title gets badly mis-parsed in diff view

A recent question received an edit to its MathJax, including in the title. Viewing the diff in the edit history, the edited MathJax in the title gets very badly mis-parsed in the diff view, as shown ...
5 votes
1 answer
103 views

Why is the wrong username showing up on a CW answer after a user changes names?

An answer to Interesting examples of vacuous / void entities was written, and only edited by, @JonasLinssen: However, the answer shows up as having been written by @PrudiiArca: The text "...
3 votes
0 answers
57 views

Cannot "Mark all as read" under very specific circumstances

This might deserve to be closed; it seems to be a bug, but a very, very minor one. The conditions under which I observed it were rather specific. I'm not sure which of the conditions were important, ...
3 votes
0 answers
108 views

In Safari on macOS, a numbered list beginning with a displayed equation swallows the number

This bug report did not originally mention the platform and the renderer. I originally put them at the end, but it occurs to me that they're more useful up front. Thanks to @DavidRoberts and @...
3 votes
0 answers
64 views

AMScd columns not aligning

The code \require{AMScd}\begin{CD} 0 @>>> \mathbf D(C) \\ 0 @>>> M \end{CD} produces $$\require{AMScd}\begin{CD} 0 @>>> \mathbf D(C) \\ ...
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 ...
6 votes
1 answer
504 views

The number of MO users

Is there any statistics/diagram that shows and compares the number of MO users in the course of time?
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 ...
8 votes
0 answers
325 views

2022: a year in moderation

As we say goodbye to the old year and welcome the new one, we have a tradition of sharing moderation stats for the preceding calendar year. As most of you here are aware, sites on the Stack Exchange ...
2 votes
3 answers
1k views

Winter Bash on MO?

I noticed that the Stack Exchange sites are having a Winter Bash, and one of my friends received a hat on MSE. Why isn't this on MO? It'll be fun to have something like that here, wouldn't it? (I ...
7 votes
0 answers
167 views

How is TeX rendered in edit summaries?

I recently edited a question Dynkin type classification for 2-dimensional hypersurfaces in non-commutative space, and entered as my edit summary "$<x,y>$ -> $\langle x,y\rangle$" <...
4 votes
0 answers
194 views

Wrong rendering in narrow width in Safari

When I view the front page right now in Safari, I see: Notice that the question mark, which the poster properly placed at the end of the equation (see the question (before another edit removed the ...
18 votes
0 answers
549 views

Posting multiple "answers" to an already answered question

This question was asked and correctly answered three weeks ago. Since then another user has posted, as of today, five other "answers" describing his thoughts about related questions, ...
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
126 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.
1 vote
0 answers
79 views

Should this question have been CW?

Yesterday I asked a big-list question (Examples of errors in computational combinatorics results). The question is naturally big-list because it asks for various examples. Now I am not quite familiar ...
54 votes
8 answers
3k views

We have our first user with more than 200K reputation!

Congratulations to Joel David Hamkins who on (I think!) the 27th November 2022, was the first MathOverflow user to pass 200k reputation! Since Joel joined on the 19th November 2009, he has supplied ...

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