All Questions

I noticed that there have been a huge number of badges awarded today and yesterday and perhaps for the past few days, particularly for the Announcer and Booster badges, mostly for posts that were in ...

I just wanted to vote to close a question, and it looks like the list of options has changed The options are now: Duplicate of... Off-topic because... Needs details or clarify Needs more focus ...

Around a month ago I asked a question on ME here. It was well received (got seven up votes). Sadly nobody was able to help much. To get more attention I also placed a bounty on it. Still no luck. The ...

So +1 get 10 points for answers and questions, and -1 give -2 points. It is easy to see that users only have even reputation numbers now. Or did I miss a reputation-changing mechanism? (If not, why ...

In case you missed the news, upvotes on questions now grant +10 reputation instead of +5, and the change has been implemented retroactively (most if not all users have already had their reputation ...

So now StackExchange thinks questions are worth +10 rep again. Here is a comment where a StackOverflow user noticed their rep jump by ~6k. Just now I was presented with a banner announcing this ...

Let {Site1,Site2}={MathOverflow,xxx.Stackexchange} (in either order, with xxx representing "superuser" or "chess" or any of dozens of others). I want to be logged into Site1 as Name1 and ...

I have noticed just now that a user has chosen as pseudonym "Alexander Grothendieck", which I'm a bit unconfortable with (the probability that it is also that user's name is extremely low, hence my ...

Some of the most common close votes are for people who have posted homework questions, to which the usual appropriate response (to my understanding) is to flag as off-topic with the message "...

[Long-time 10k+ MO user here, asking this question anonymously for reasons that should be obvious. Added Oct 16: My access to this account will self-destruct in 3, 2, 1 .... (sorry, won't be able to ...

I posted Lower bound on Carmichael Function and just assumed it belonged here, but after thinking about it for some time I'm not so sure. The Carmichael function itself might be encountered by other ...

One issue with the site lasting as long as it has is that technology has changed quite a bit since its early days, and so discussions of technology are extremely out of date. In particular, when ...

Should there be another tag for vector bundles in Algebraic geometry (over schemes)? Some questions about vector bundles in the sense of algebraic geometry are given the tag whose tag description ...

It seems that my account in MO has been blocked. My post is no more accepted, saying that we are no more accepting post from this account. How can I get my account unblocked?

What are some instances of MathOverflow being mentioned in the media? Now that MathOverflow has recently had its tenth anniversary, I would be interested to learn of any mentions of it in the mass ...

Question 1 was a test question posted about ten years ago from this one (give or take about an hour). There's been a bit going on since then with the main forum. This post is a place for celebrants ...

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 ...

Oftentimes, I read something and start to ponder questions of the form "Does the formula on pg. 87 have a typo?" or "Isn't this a gap in the proof?" or "Why does the definition have this extra ...

Is there a connection between Mathematics and MathOverflow sites? Obviously topics are similar, but I mean something like: do questions posted on one site, perhaps with certain tags, automatically end ...

Since this issue came up in comments to another questions on meta, I'll ask about the intended issue of the open-problems tag. Question. What is the intended usage of the open-problems tag? Should it ...

The following occurs on my activity page: The question it links to is Is there an explicit expression for Chebyshev polynomials modulo $x^r-1$? and it seems that the MathJax in the end somehow got ...

As you know, MathOverflow has a special status in the Stack Exchange family, and (by a special agreement) it doesn't display any kind of ads nor links to the hot network questions in the sidebar. ...

I am currently doing a reading on Teichmuller space and I am having trouble understanding some basic definitions. So I asked these two questions on MSE first: Understanding Teichmuller equivalence of ...

A few weeks back on the Math Stack Exchange, I asked this question about "interesting" PDEs. It got (no answers and) some deserved criticism, so I opened a discussion on the Meta there and made some ...

I'm relatively new to MO (but have been on MSE for a longer time), which means that I don't have enough reputation to create new tags. Which is probably a good thing. Lately I've been puzzling with ...

Update: the question has now been asked on the main site - Applications of number theory in dynamical systems I am considering asking a reference-request type question on MO about significant and/or ...

[Topic very similar to several other recent questions, but the central question is I think not a duplicate.] The meta thread Should these sexually suggestive jokes be kept or deleted? raised the ...

Question: If the question is about proving $P$, which, pointed out in comments, follows from $Q$ and $R$. Is it acceptable to write an answer only containing the proof of $Q$, as part of collaboration?...

I have noticed several posts with links to pdf files where IP address is used instead of domain name the url.1 (I will list them below.) Several of them seem to be dead. Moreover, this type of url ...

Following the discussions in Area 51 community peer review and links therein, I have created the following proposal Mathematics Open Community Reviews hoping to get things started. The proposal ...

[In case of hurry, please scroll down to the suggestions at the very end.] The deletion of the Math Jokes thread (mirrors: html or pdf), most likely provoked by the meta.MO debate about some specific ...

There are a few jokes in "Do good math jokes exist?" that I think are inappropriate. Specifically: Nov 21 '09 at 9:01 item (1) Oct 19 '09 at 16:03 Dec 10 '09 at 23:14 Dec 15 '09 at 1:31 All of ...

A short while ago, this site was down for maintenance. However, the error page shown during said maintenance period incorrectly stated the name of this site: As you probably know, this site is ...

It looks like the Stack Exchange network is trying to monetize the various stack sites as much as possible, to the dismay of users across the board. Will this affect MO? If I recall correctly we ...

Today (2019 July 6) a new user had posted a question that received some upvotes The problem is from contest.Please flag it for removing it and I had provided an answer that didn't solve the problem. ...

I just want to add a computer program to my answer. However all my attempts to copy it result in total garbage displayed because all "less" and "greater" signs are perceived as HTML markers. I tried ...

I just came across the following question: Kaczorowski's paper on Distribution of Primes In case the question gets deleted or closed in the future, the OP asks for a specific reference, which is ...

The question Floating polyhedra with fair equilibria was answered by Bill Thurston, but his (typically amazing) answer contains links to 7 figures, all now broken. I don't know how to retrieve those ...

Not too long ago - in March 2019 - some changes have been made to the Hot Network Questions (HNQ). Some of the new features are the limit on the number of hot questions from a single site, or limit on ...

In my opinion, there is a moral obligation on those asking questions to do something with the answers: Either accept one, or to explain why none of the answers is satisfactory. I do not see this ...

On Sep. 28, 2009, MathOverflow went online, and has almost ten years of almost constant operation, thanks to StackExchange. There will be an obligatory post observing the anniversary. The board of ...

There is a story about Gauss being "unimpressed by FLT, pointing out (after finding a proof of the n=3 case) that in number theory it’s very easy to come up with problems that are very hard.". But, ...

I have a question that´s been put "on hold". And I have some questions. Who can see that this question is "on hold"? Can that see all users of the site or even some people who browse this site "...

What is the correct way to handle spam on MathOverflow? Can regular users do something when they see a spam post?

I recently became aware of MathOverflow arXiv trackback feature that was custom implemented by @ScottMorrison. This is just awesome and certainly serves very well MathOverflow community. I was ...

This question has an outstanding bounty from the Community user. How does that happen?

There's been past discussion (e.g. here) about whether MathOverflow should allow posts from unregistered users. I am fully on board with the apparent consensus that the answer is yes, because of the ...

Can it circumvent and avoid awarding bounty for own answers and reward answers by posters other than the author of the question. Why avoid the author from starting bounty itself all together. In such ...

Using Firefox on an iPad, suddenly the view for the main site changed; it now looks as follows: The meta site looks the same as it always has, and when I go to the site using firefox on a different ...

One closing option is primarily opinion-based: Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on ...