# All Questions

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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 ...
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530 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 ...
117 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 ...
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92 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 "...
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51 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, ...
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62 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 ...
799 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 ...
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101 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 @...
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61 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) \\ ...
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1 vote
80 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 ...
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491 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?
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311 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 ...
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163 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 "$<x,y>$ -> $\langle x,y\rangle$" <...
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### 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 ...
532 views

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, ...
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1 vote
77 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 ...
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122 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.
65 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 ...
1k views

### Let us wear hats

Many of the other stackexchange sites enable a festive wintertime custom every year in late December, the Winter Bash, in which user profiles are accommodated with fanciful hats, earned for various ...
74 views

### Drop-down lists

Would it be possible to have markdown drop-down lists in MO? I think that hiding lengthy examples, components of long proofs, edited out text etc., inside such menus could add readability.
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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 ...
• 4,580
604 views

### Should we flag suspected ChatGPT posts?

Another meta question raised the issue of AI-generated (by ChatGPT or similar) posts. I have a more specific question. If we see a post that we suspect to be of this genre, would the moderators like ...
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1 vote
37 views

### How should we respond to user profiles (as opposed to questions or answers) that appear to be spam? [duplicate]

I've come across 10 different MO user profiles that all have very similar usernames that contain the name of a company. None of these users have any activity on the site except for filling out their ...
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131 views

Here's my proposed question (edit: now posted) (edit 2: posted version now edited): I have found an algorithm for counting partitions, and I've been able to express it into a mathematical formula, $P(... -3 votes 1 answer 189 views ### Can a question be muted from showing up to the front of the page so answers can edit their response as much as they please? I liked the answer to this question: An algebra of "integrals" by @anixx Which had a very detailed table attached. My understanding is the answerer had updated the question some 35 times to ... • 1,440 9 votes 2 answers 206 views ### Should tags be removed from spam? When flagging spam, I usually delete tags and replace them by tag-removed as well. I just received a comment suggesting that this is not useful. It probably doesn'... • 51.8k 4 votes 1 answer 127 views ### Double overline renders poorly, except in MathML A post Mathematical formulation of beam: get stress/strain from forces and momentum uses \overline{\overline{…}}. The results below are mostly from Safari 16.1 on ... • 9,764 53 votes 2 answers 3k views ### ChatGPT strikes MathOverflow The user (or a bot) https://mathoverflow.net/users/496085/canvas123 appears to be posting ChatGPT-generated text on MathOverflow. Two “answers” by this user already got accepted (!): When is a ... 14 votes 1 answer 301 views ### Mathoverflow for finding the name of mathematical concepts I am used to posting on MathOverflow problems with questions. However, now I am looking for the name of a mathematical object that I think already exists (and I would be happy to find reference ... • 1,593 19 votes 1 answer 565 views ### Creation of "procrastination" tag One user has created the tag procrastination: see this question. In principle I would have immediately deleted it as totally irrelevant (in the same way I would delete "Stupid question" or &... • 55.3k 4 votes 1 answer 215 views ### The tags (publishing) and (journals) - maybe change direction or cancel the synonym At the moment there is a synonym publishing$\to$journals. (With the tag journals as the master tag.) I think that at least for some questions tagged journals: Using a tag called publishing might be ... • 4,580 54 votes 8 answers 3k views ### We have our first user with more than 200K reputation! Congratulations to Joel David Hamkins who on (I think!) the 27th November 2022, was the first MathOverflow user to pass 200k reputation! Since Joel joined on the 19th November 2009, he has supplied ... 3 votes 1 answer 92 views ### Integral sign cut off in Safari I am using Safari version 16.1 with the HTML-CSS renderer. A displayed formula in the post Convergence by parameter involving inf renders as follows: This happens even with extensions disabled, but ... • 9,764 4 votes 1 answer 86 views ### Occasional "echoed" usernames in Firefox I noticed about a month ago that quite often in the latest version of Firefox (but not in Chrome) under Windows 11 usernames become distorted like this Does anybody else see this or it is just me? ... • 17.1k 7 votes 0 answers 400 views ### Did mathcal stop working properly? Does this question Basic algebra of$\mathcal{O}_0(\mathfrak{sl}_n(\mathbb{C}))$— Reference request look like this for anyone else?: Those squares are supposed to be \mathcal{O}'s. As far as I can ... • 20.5k 5 votes 1 answer 129 views ### What is a supported use of \hfill? According to Supported TeX/LaTeX commands, \hfill is supported. However, as expected, it doesn't work in ordinary text \hfill ; and using it in math mode seems to ... • 9,764 9 votes 0 answers 280 views ### New tag for "stochastic partial differential equations" (SPDEs) Since there are separate tags for a) ODEs, ca.classical-analysis-and-odes and differential-equations and for b) ap.analysis-of-pdes but only one tag for stochastic-differential-equations, I was ... • 2,720 8 votes 1 answer 169 views ### Interesting question deleted by author — how to reach out to author to ask to undelete? "Coloring Gaussian integers based on a numeral system based on powers of$-1+i\$" was an interesting question that was recently asked. I left a comment with some relevant keywords and links (...
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I am using Safari 16.1 on macOS 12.6. The invitation to "Share a link to this question" appears for me like this: I assume that the Twitter and Facebook links are not showing because of ...
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221 views

### Why is this question locked?

This question has only two downvotes, which is not enough to keep it off the front page. I'd therefore like to downvote it, but can't, because it is locked for mysterious reasons. Because this does ...
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### Where did the reputation go?

Some time ago, it was decided that reputation should no longer be displayed by default, but users had the possibility to opt in to see it, as explained by Ben Webster. I had opted to see reputation, ...
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354 views

### Why was my question deleted?

Why was my question Is the Frog game solvable in the root of a full binary tree? deleted? It was a cross-post, but I followed all recommended advices when doing so. It was also decently upvoted (12+). ...
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381 views

### Migrated question returned to MO - how to handle?

The question I am referring to is Is all complicated modern math intuitively understandable? (See the user's math.SE account to see that the question was at one point migrated to math.SE.) I think the ...
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476 views

### If it doesn't interest you, don't read it!

As an algebraist, if I see an analysis question on Mathoverflow that falls outside my expertise, I probably won't read it in details, and if I do read it, I certainly won't judge its "level",...
513 views

### What to do with the erdos tag?

This was discussed before but that discussion is outdated. Tags related to a specific person are generally bad. (This is not the same as specific topics named after a person, e.g. Galois theory is not ...
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### 2022 Election results: Congratulations to our new moderator!

The election is over, the votes have been counted, and on behalf of the current team and board, I'd like to welcome David Roberts to the moderators team! I'd like to thank Carl-Fredrik Nyberg-Brodda ...
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207 views

### Which questions should be tagged “reference-request”?

The reference-request tag is currently described as: “this tag is used if a reference is needed in a paper or textbook on a specific result.” I have found current usage of this tag too broad to be ...
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### Edit history lost on migration

According to a comment, @Marco's answer to Notation about n choose k permutations was edited before migration. However, nothing displays in the edit history. (This seems appropriate to ask here since ...
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144 views

### Weird site URLs

If I go to MathOverflow from another SE site by clicking on the link in “Your Communities” under the right-most menu on the top-bar, I do not end up with the usual ...
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