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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 ...
LSpice's user avatar
  • 11.3k
0 votes
0 answers
127 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.
Buster Solomon's user avatar
7 votes
1 answer
169 views

How to find highly upvoted comments?

My question is simple: is there a way to find the most highly upvoted comments on mathoverflow?
Gil Kalai's user avatar
  • 24.2k
6 votes
1 answer
965 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 ...!)
Fred Dashiell's user avatar
10 votes
4 answers
305 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 ...
LSpice's user avatar
  • 11.3k
2 votes
1 answer
238 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 ...
HARRY's user avatar
  • 267
5 votes
1 answer
310 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 ...
YCor's user avatar
  • 60.1k
4 votes
0 answers
69 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 ...
LSpice's user avatar
  • 11.3k
2 votes
1 answer
156 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 ...
LSpice's user avatar
  • 11.3k
4 votes
1 answer
135 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 ...
მამუკა ჯიბლაძე's user avatar
4 votes
1 answer
186 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 ...
Carl-Fredrik Nyberg Brodda's user avatar
3 votes
0 answers
62 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: ...
LSpice's user avatar
  • 11.3k
18 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", ...
YCor's user avatar
  • 60.1k
35 votes
4 answers
2k 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 ...
Federico Poloni's user avatar
2 votes
1 answer
65 views

Why isn't the link processed in this comment?

At The concept of duality, it looks like the link in the comment is perfectly well formed. Why isn't it parsed as a link?
LSpice's user avatar
  • 11.3k
3 votes
1 answer
113 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 ...
LSpice's user avatar
  • 11.3k
3 votes
1 answer
138 views

Is linking to comments possible?

I vaguely remember seeing links to comments somewhere, was it a dream or it is indeed doable?
მამუკა ჯიბლაძე's user avatar
23 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 ...
Patriot's user avatar
  • 1,038
9 votes
1 answer
280 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 ...
Praphulla Koushik's user avatar
6 votes
0 answers
332 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.
Joseph O'Rourke's user avatar
44 votes
2 answers
2k views

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 ...
domotorp's user avatar
  • 18.3k
4 votes
1 answer
92 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 ...
Gro-Tsen's user avatar
  • 29.9k
2 votes
1 answer
154 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 ...
Wolfgang's user avatar
  • 13.2k
0 votes
0 answers
97 views

reminder for comments/responses

Suppose a user commented on my post and due to some reason I overlooked and then forgot. As it is my question, the one who responded for my question would not care to write another comment if I do ...
Praphulla Koushik's user avatar
2 votes
0 answers
234 views

Should @ in referring to some one in comments be changed

Suppose I want to refer some person X in comments, I write @X. Suppose the name of that person is not in English script, it is not clear how to refer that person. Some times it comes automatically ...
Praphulla Koushik's user avatar
0 votes
0 answers
171 views

Should there be Anonymous Comments?

I currently got a downvote for my question Making a Graph Eulerian for Applying TSP Heuristics, but unfortunately the downvoter didn't leave a comment explaining what the motivation was, thus ...
Manfred Weis's user avatar
  • 12.6k
2 votes
0 answers
101 views

What should I do if I have a question on inactive post?

I recently asked this question about gamma function, and Vincent law commented a link to another post which stated similar question. There I found a link to MathOverflow post. I visited there, and I ...
KYHSGeekCode's user avatar
4 votes
1 answer
155 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 ...
LSpice's user avatar
  • 11.3k
7 votes
1 answer
194 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 ...
LSpice's user avatar
  • 11.3k
12 votes
2 answers
705 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 ...
Alex M.'s user avatar
  • 5,207
-14 votes
1 answer
382 views

Can anyone learn anything from a downvote without an accompanying rationale in a comment?

I have been on enough web boards in both the arts and sciences that I have learned not to be bothered by downvotes in and of themselves. What does bother me is a downvote without an accompanying ...
David Halitsky's user avatar
1 vote
3 answers
193 views

How to find the meta-thread of an MO-thread at hand? Is there one? Should there be?

Questions. (0) How to find out for an MO question at hand whether it already has anything like its canonical meta-thread? (1) Should, in your opinion, every MO question automatically generate a meta-...
Peter Heinig's user avatar
  • 6,001
3 votes
1 answer
279 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: ...
Fred Daniel Kline's user avatar
1 vote
1 answer
724 views

A remark on the abc conjecture

It went/goes something like this: "It [the abc conjecture] resembles a false proposition in that A GREAT DEAL of results would follow from its veracity". I may have read it in the comments of a ...
José Hdz. Stgo.'s user avatar
8 votes
1 answer
321 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 ...
user avatar
9 votes
1 answer
270 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 ...
Jeremy Rickard's user avatar
7 votes
1 answer
482 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'...
Smi's user avatar
  • 105
16 votes
1 answer
562 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 ...
მამუკა ჯიბლაძე's user avatar
12 votes
1 answer
576 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 ...
Thomas Kahle's user avatar
  • 1,961
14 votes
0 answers
234 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 ...
David E Speyer's user avatar
8 votes
1 answer
178 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?
მამუკა ჯიბლაძე's user avatar
4 votes
2 answers
157 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 ...
მამუკა ჯიბლაძე's user avatar
12 votes
1 answer
324 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 ...
Amir Asghari's user avatar
  • 2,277
3 votes
1 answer
177 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, ...
Manfred Weis's user avatar
  • 12.6k
8 votes
1 answer
283 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 ...
Yoav Kallus's user avatar
  • 5,926
1 vote
0 answers
550 views

Risqué and uninformative title.

I found the previous title of Realizing proper pure octonions as conjugates slightly risqué and also uninformative. So in the spirit of being bold I just changed it to something mathematical. I'...
Sam Nead's user avatar
  • 26k
33 votes
5 answers
744 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. --...
Stefan Kohl's user avatar
  • 19.5k
4 votes
1 answer
201 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 ...
Noah Schweber's user avatar
14 votes
1 answer
530 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 ...
Manfred Weis's user avatar
  • 12.6k
18 votes
0 answers
162 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 ...
Wolfgang's user avatar
  • 13.2k