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43 votes
2 answers
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How to cite comment by unknown user disproving Erdős conjecture?

I believe that fedja has disproved a conjecture of Erdős et al. when commenting on my question Almost monochromatic point sets, but I'm unable to contact fedja regarding this. What shall I do? Shall I ...
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  • 17.2k
36 votes
4 answers
815 views

Why not 'thanks' in comments?

I've noticed a message in mathoverflow's place for comments saying that '+1' or 'thanks' comments are not appropriate. I don't agree with the second kind of comment being inappropriate. I think it's ...
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33 votes
4 answers
1k views

Answers in comments are increasingly more common

I have checked a random sample of questions in the main page, and it seems that almost every one of them has some form of answer in the comments, apart from completely unanswered/untouched ones. This ...
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33 votes
5 answers
731 views

Couldn't the comment vote rate limitation be made more ergonomic?

Quite often I read a comment thread, and then decide which comments I vote up. As soon as this is more than one comment, I get an error message that I can cast only one comment vote every 5 seconds. --...
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  • 18k
22 votes
1 answer
5k views

Why was my dissenting viewpoint in a post about diversity censored?

In a question about special lectures for the ICM, the following answer proposed that a lecture on how to make the mathematical field more diverse be given. The answer contains some rather bold ...
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  • 968
20 votes
1 answer
777 views

The math! It's overflowing!

See what happens if you expand the comments on this question, we get this prime example of a math overflow: Of course, this is due to a \$ problem, but still, it seems to be a flaw in the CSS that ...
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19 votes
4 answers
1k views

Deletion of on-topic comment threads

This question is about suppression of threads of comments by moderators, moved to chat with the message "Comments are not for extended discussion; this conversation has been moved to chat", ...
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  • 51.8k
18 votes
0 answers
157 views

Making it easier to access hidden comments

This is a follow-up of this recent post, and hopefully a feasible suggestion. Problem: If a question/answer has many comments (say more than fit on my screen) and I decide to read them all, in ...
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  • 12.6k
17 votes
3 answers
1k views

Comment template for questions more appropriate for MSE

I think it would be nice to have a comment template that everyone could use when a (new) user asks a question on the site which is clearly more appropriate for MSE. Here's what I've been using today: ...
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16 votes
1 answer
546 views

Is there a problem with answers clarified in comments, but the clarification not reflected in the answer itself?

Occasionally I am re-reading my answers in case I've overlooked something or left some misguiding misprint or something. What I noticed is that there are a couple of them where I was not entirely ...
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15 votes
1 answer
330 views

comments that are not displayed right away ("add/see 10 other comments")

Often when I start reading comments, it is only when I come to the end that I see a link like "add/see 10 other comments". I can understand that if there is a huge list of comments for the same ...
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  • 12.6k
15 votes
0 answers
157 views

Converting a too-long answer in a comment should generate an error message

I just tried to convert an answer into a comment; it was too long for a comment, and the software just truncated the text. I think it would be better to either generate an error message, ask for ...
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14 votes
1 answer
506 views

Interpretation of Time-limit for Editing Comments

Yesterday I had written a comment and, after 4 minutes began editing it. After having finished my editing, I tried to save the comment and was prompted with the message, that editing is only possible ...
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  • 11.1k
13 votes
3 answers
444 views

Cleaning up comments

Traditionally, MathOverflow moderators only delete comments that are highly problematic. Even in that case, we copied the entire deleted comment thread to tea.mathoverflow.net. Since migrating to the ...
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13 votes
0 answers
232 views

Long MathJax in comment breaks linewrapping throughout the comment thread [duplicate]

A picture is worth a thousand words; here is what I am talking about, from the comments on this post. By posting a very long formula into MathJax, not only have I caused my own comment to run off the ...
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12 votes
1 answer
517 views

When to answer a question via a comment?

I have noticed something a bit confusing to me during my first few days here at MathOverflow. In the "about" section it says users can "improve posts by editing or commenting." On multiple occasions I ...
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12 votes
2 answers
684 views

Why did flagging a comment for deletion made it disappear immediately?

I wrote a comment under an answer, claiming that the answer was wrong. The poster replied to me in another comment, showing that my argument was wrong. Acknowledging this, I deleted my comment and ...
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  • 4,720
12 votes
1 answer
557 views

Should I delete my own question if it turns out trivial after a comment?

I had not given this question enough thought before asking it. I went straight to looking for a reference without thinking about it. Somebody pointed out the obvious solution in a comment. Should I ...
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  • 1,971
12 votes
1 answer
317 views

Being notified of the comments under the answer of someone else to your post

Sometimes a lot of good things happen as the comments under an answer to your post. Though we are notified of the answers given or the comments under the body of the post, it seems that we are not ...
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  • 2,259
11 votes
3 answers
379 views

Should there be a general policy for putting comments on "not-suitable-for-MO" questions?

Right now, there is a question posted on MO that rightly does not belong to MO: The equivalence of the mathematical induction and the principle of the smallest. Of course, such questions comes and ...
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  • 2,259
11 votes
2 answers
1k views

Why adding a comment requires 50 reputation points?

When a new member tries to write a comment he sees “add comment (requires 50 reputation)” but of course he has no so many points. On the other hand, answering does not require any reputation. Then the ...
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  • 31
10 votes
3 answers
618 views

"This question has been answered in the comments."

Athanagor Wurlitzer has recently been adding answers saying "This question has been answered in the comments" (see, e.g. https://mathoverflow.net/a/156051/3). I'm inclined to delete these answers (...
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10 votes
1 answer
176 views

Should I be able to notify multiple people with the same comment?

One of the many things I was excited about in our move from MO 1.0 to 2.0 was the chance to leave responses to previous comments that automatically notify those people. Occasionally, a conversation ...
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9 votes
1 answer
457 views

Is it considered good practice to clean up one's "useless" comments?

Hovering with the mouse above the upvoting arrow of a comment shows the text "this comment adds something useful to the post". Therefore arguably the number of upvotes a comment receives equals the ...
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  • 18k
9 votes
1 answer
274 views

Is it ok to write a CW answer extracted from a comment of some user?

Suppose I have seen an answer to a question by a user X. Suppose another user Y leave a comment under X's answer. This comment received good number of up votes (6 as of now). This comment is not ...
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9 votes
1 answer
372 views

Questions answered in a comment

It may happen that a question has zero answers, but is actually already answered satisfactorily in a comment. An example is this question. I think this is somewhat misleading, as the "0 answers" ...
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  • 18k
9 votes
1 answer
264 views

I can't post comments on first generation iPad

I have a first generation iPad, with OS 5.1.1, and sometimes look at MathOverflow on it, in the Safari web browser. Recently, it seems as though posting comments has stopped working. I type the ...
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8 votes
1 answer
281 views

What is to be done about replies left as edits?

This question attracted a comment that seems relevant and helpful. Unfortunately, the user who tried to leave this comment is new and has a reputation of 1. The user could not leave comments, so ...
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  • 5,758
7 votes
1 answer
467 views

The strange case of a declined comment flag

I came across this question and noticed there were four comments stating the current number of deleted answers. However, as none of them were up-to-date, I decided to flag them as obsolete. But here'...
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  • 105
7 votes
1 answer
169 views

Changing mind about upvoting a comment

If I change my mind about upvoting a comment, is there any way to cancel my upvote there?
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7 votes
1 answer
289 views

Can a bounty be awarded to an answer in a comment?

Recently I have placed a bounty on this question. The question has no answer in technical terms, but it has been answered in a comment within the bounty period. Now the banner below the question says ...
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  • 18k
7 votes
1 answer
179 views

How to cut and paste

It has happened a few times that I have wanted to move someone else's answer from the comments to an answer, when the poster implicitly does not wish to do so (by not responding after a days-old ...
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  • 7,931
6 votes
0 answers
330 views

Only one addtional @user

Why do we have this restriction? There are many circumstances where it is natural to cite several users (especially when several=two) in one comment.
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5 votes
1 answer
304 views

Automatic comments by Community

There seem to be automatically generated comments by "Community". As an example, this question by a new user has Please clarify your specific problem or provide additional details to ...
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  • 51.8k
5 votes
1 answer
193 views

Backticks breaking MathJax in comments

The backticks that were used to circumvent MathJax problems on MO 1.0 were removed in questions and answers. However, it appears that the comments were not affected by this fix and thus display ...
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  • 1,247
5 votes
1 answer
238 views

Comment / Down-vote / Vote to close -- in what order, with what delay?

If I see a post that I think belongs on MathStackExchange, what should be my first response? a) Comment to the user b) Down-vote c) Vote to close with suggestion of migration And how long should I ...
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  • 16.7k
4 votes
1 answer
198 views

Problem replying to comments

Usually, I'm able to address a comment to someone by writing "@[whoever]" before the text; but in a comment to a recent question (Compact, densely ordered spaces) I wasn't able to do this: when I ...
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4 votes
1 answer
85 views

Migrating a question removes some comments?

This question has just been migrated to MSE, but I notice that not all comments were migrated in the process. This is unfortunate because one comment (by YuiTo Cheng) pointed to a highly relevant ...
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  • 22.1k
4 votes
1 answer
141 views

Markdown not rendering in a particular comment

In a recent comment, one occurrence of stars-to-italics ('particular') doesn't render, but one does ('abstract'). This seems to be a bug. Is this the right place to report it? EDIT: Now also ...
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  • 7,931
4 votes
2 answers
152 views

Is it possible to provide information about further developments outside MO that followed a question/answer?

It happened several times - I've found a very interesting (for me) relatively old answer or question which would most likely lead to some new research. I ask about any possible recent references in a ...
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4 votes
1 answer
114 views

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 ...
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4 votes
0 answers
44 views

Occasionally reproducible bug with macro definitions in a draft post affecting macro use in comments

In the course of a discussion involving using MathJax to re-define macros, I couldn't recall if MathJax obeys a \newcommand for an already-defined macro, and so ...
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  • 7,931
3 votes
1 answer
168 views

I can't find a comment to my answer

I have posted an answer to this question: Most dispersed set of points in a disk?, but do not see any indication that a comment has been left to that answer, if I however use the StackExchange App, ...
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  • 11.1k
3 votes
1 answer
227 views

Searching for comments

Is there a method to search past comments only. I'm interested in a comment I read years ago that was not specific to the question or answers, so it wouldn't be in the normal search. Keywords: ...
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  • 1,041
3 votes
1 answer
165 views

Answer converted to comment, then reverted to answer

Earlier today, this answer to this question was converted to a comment by a moderator. The same moderator subsequently reconverted the comment back into an answer an hour or so later. One of the ...
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3 votes
1 answer
77 views

`\DeclareMathOperator` at the beginning of a comment disables some link parsing

In a comment of the form $\DeclareMathOperator\a{a}$Here's a [link](http://mathoverflow.net) and [another link](http://mathoverflow.net) $\a$, neither link is ...
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  • 7,931
3 votes
0 answers
52 views

Math-mode formula in comment breaks incorrectly across lines

In the following comment, both summands should appear before the period: The source for the comment is: ...
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  • 7,931
2 votes
1 answer
193 views

Citing a mathoverflow comment

One can easily cite a mathoverflow answer as there is an option "cite" below every answer. But there is no cite option to any mathoverflow comment to a question. One is then forced to cite ...
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  • 257
2 votes
1 answer
145 views

Chat page has disappeared

I recently looked at an old question of mine (well, old, but the answer & discussion this refers to happened less than 2 years ago.) After a long discussion with the answerer in the comments, I ...
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  • 12.6k
2 votes
1 answer
138 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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  • 7,931