Newest Questions
1,932 questions
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2025 Moderator Election Q&A – Question Collection
MathOverflow is scheduled for an election next week, 2025-05-13. In connection with that, we will be holding a Q&A with the candidates. This will be an opportunity for members of the community to ...
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mathoverflow login (via GitHub) stopped working for stackexchange sites - how to log in?
Few months ago I noticed that I am forced to re-login any time I leave mathoverflow for another stackexchange site in my usual desktop browser (Firefox on Linux). I use GitHub account to login on ...
- 14.4k
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Old question nominated for reopening multiple times
The question Assessing effectiveness of (epsilon, delta) definitions has been recently reopened. In the history, I see that it has been "left closed in review" two times in the past 10 hours,...
- 20.3k
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Random Braces appearing before every question
I hope it is not just me, but when I open up a question on MO, I see a pair of braces above the question title. (See screen cap below.)
You can see them in the page source too (line 721 and 726 below)...
- 40.5k
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Why doesn't a \smash'd \check show on a \tag'd formula?
The following Minimal (Non-)Working Example is boiled down from @ElíasGuisadoVillalgordo's answer to Is there a complex which computes Čech cohomology?. Consider the following two displayed formulæ:
$...
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Asking for advice
My name is Ben Sprott and I am a physicist, computer scientist, and inventor. I have been using MO for years.
I get a lot of hate in here on top of the great answers. I need to know how I can keep ...
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Why homework-level questions are acceptable when they are asked by a celebrity?
...For example, this one: Is there a non-simply-connected topological ring?
The question is insanely verbose and "thought-provoking" in its form, but its mathematical content is trivial. The ...
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Proving I am a human
Today I composed a math research question for this site.
Trying to submit it, I had to click on motorcycles, bicycles, cars and pedestrian crossings for more than 10 minutes.
Could you implement some ...
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By what criteria do Mods decide to make questions CW?
A recent question of mine was made CW by a mod without any prior (or posterior) notice or discussion. While I'm fine with mods deciding that some questions should be CW, I wonder what criteria are ...
- 3,419
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Is MathOverflow leaning towards foundations?
Mathematics, as we all know, is a diverse forest full of interesting, strange, natural, obscure, appealing, highly abstract, and intuition-defeating topics: depending on which researcher you ask the ...
- 51.1k
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Account was "sent back to zero"
I just noticed that my account on MO was sent back to 0, like all questions & answers appear to be deleted. How can this happen?
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Reputation and badges aren't showing on questions/answers [duplicate]
Users' reputation and badge counts aren't being shown on questions. Here's what I mean:
This issue seems to only be affecting MathOverflow (not including MathOverflow Meta). After inspecting the HTML,...
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Asking if an unanswered MSE question (about characteristic classes) is suitable to be posted in MO
https://math.stackexchange.com/questions/5024382/characteristic-classes-of-flat-g-bundles-induced-from-g-invariant-forms-on
Here is the question I posted on MSE several days ago. It seems to be a bit ...
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2024: a year in moderation
It’s that time of the year again! As we bid farewell to the year that's concluded and welcome the new one, we have a tradition of sharing moderation stats for the preceding calendar year.
As most of ...
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When will I be able to post another question?
A few years back, I got a question ban for asking poorly received questions. I didn't know how to improve most of the questions so I deleted them.
The last time I posted was August 6, 2024. The ...
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