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Long time followers of MathOverflow will know that as well as the website, hosted by StackExchange, and moderated by the moderation team with all of your help, there is an independent 501(c)(3) ...

There has been some recent concerns about MathOverflow's relationship with StackExchange: see What is MathOverflow's "agreement" with Stack Exchange? How much is MathOverflow exposed to ...

It's been fairly well known for some time that ImageShack is a poor image host for Stack Exchange, because they frequently delete old images and replace them with placeholders. Recently, however, ...

I created a graph of tags from Stack Exchange sites (including MathOverflow), TagOverflow. It is a continuation on my previous project - plots with static graphs and (sadly) without MO (due to API ...

As some will cerainly know today (September 28th) is MO's anniversary, its fourth to be precise. Since this year it appears there is no system-message to celebrate the event, I thought I create this ...

Professor Richard K. Guy, the great number theorist had passed away long before in March. Since there were no posts to commemorate him on this site (as far as I saw), I decided to post this question ...

Motivation 1 Currently the custom off-topic reasons for MathOverflow read: This question does not appear to be about research level mathematics within the scope defined in the help center. ...

The election process is over, and now it is time to declare the winners: Good luck in the new position, I'm sure that you'll prove to be a great addition to the community and its moderators! On ...

In the following image, depicting a piece of a comment on MO.se the words «this link» are a link to some URL, yet the styling makes it quite not apparent; the only styling I can see is a ...

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 ...

Many of you may be familiar with PROMYS, a camp based out of Boston University which teaches number theory to high school students each summer. Students applying to the program are asked to submit ...

The question "The probability for a streak when tossing a coin" is on hold. [Edit: It has been reopened.] I disagree with closing the question and voted to reopen. This problem may sound like it is ...

I liked the fact that in MO v1, any question which contained one of my list of favorite tags was noticably highlighted (a brown-orange color, if I remember correctly). In the new version, such ...

This "question" (asking for generalized help with a long list of elementary topics) is clearly going to be unwelcome almost anywhere, yet two users voted to close with a suggestion to "see math....

The tag system on MathOverflow is designed in such way that each question should contain top-level tag; these are the tags which correspond to subject areas on arXiv and generally have format such as ...

I just posted a question and I noticed that unvisited links use a color that is difficult to distinguish ... but visited links are even harder to recognize. See the snapshot below from my Firefox 41....

I recently received a downvote without comment on a question and all of its answers, which are good independent of the value of my question imo. I’ve also had two other questions receive similar ...

You could save me a few heart attacks :-) by changing the message to the more clearer "Voter was removed" (or whatever you see fitting). I first thought I was removed (maybe on another suboverflow, ...

I'm sorry to report the sad news that John Nash has died. Requiescat in pace.

User homepages used to display the information "last seen ... (min/days/...) ago". It appears this feature is gone now. I found it useful, and while it does divulge some otherwise ...

MO users might be interested in this StackExchange experiment: Testing three-vote close and reopen on 13 network sites. There has been considerable discussion around close-votes in MO Meta over the ...

I recently gave a simple counter example to a question posed (I'm sure the mods can see the question). Probably the user was embarrassed by this. The question was promptly deleted and with that my ...

The tag lattices is a problem since a long time. Over the years there were varied discussions about this, but no clear resolution emerged, though some things were done to better the situation. This is ...

One of the (many) problems with MathJax is that formulas are rendered using a client-side JavaScript. Apart from the process itself being ridiculously slow, this also means that the entire page must ...

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 ...

Do the recent changes to Stack Exchange Terms of Service affect MathOverflow in any way -- and if yes, what are the concrete effects?

When reviewing first posts that are answers or late answers to questions that have existing answers I invariably go to the original question to see these answers since I want to check if these new ...

Once a post has been edited once, there is a direct link to the revision history of the post that is visible to everyone as in this example: However, when a post has not been edited, this link is not ...

This is identical to my misplaced "answer" here, written while attending JMM. I am reposting a fresh question at François G. Dorais's request. I wonder if it make sense, at some future Joint ...

This is just a mention of some work Wolfram has done recently, allowing you to import a database dump of MathOverflow and analyse it within Mathematica. The Data Science of MathOverflow Their ...

A long time ago, the question What are some examples of colorful language in serious mathematics papers? was closed because someone posted a copy of Spencer Bloch's review of Milne's Étale ...

When a question is closed as "unclear what you're asking", it gets attached the following message: Please clarify your specific problem or add additional details to highlight exactly what you ...

MO is currently being the focus of what I guess to be a single particular individual R.T.Man sporting multiple unregistered users identity (like Eskand or H.night). S/he's asking multiple very similar ...

Recently I created a new proposal at area 51; it's called Math Review (http://area51.stackexchange.com/proposals/90443/math-review), and it is intended to be a Q&A site concerning troubles one ...

I have a deja vu. Are the colors wrong, completely?

Right now, there are 4 ways to vote to close a question as off-topic. "This question does not appear to be about research level mathematics within the scope defined in the help center." "...

I decided to follow up on my own thread regarding the color scheme, and test something up. Using archive.org, I loaded a copy of MathOverflow from 2011, and it turns out that the questions in one's ...

A little while ago someone asked (now deleted, but link still here: https://mathoverflow.net/questions/314572/advice-on-how-i-can-i-publish-my-solution-of-the-riemann-hypothesis?noredirect=1#...

TL;DR: I suggest to blacklist the deprecated tags that still exist on some questions, in order to prevent them from being added to new questions. There are a few tags which are deprecated and should ...

I would like to know whether there has been progress in the last five years on the 2011 question H^4 of the Monster. Given the discussion there (and also given what else I know of the field), it seems ...

This question (now deleted) asked for a way to compute generators for $I \cap \mathbb{Z}[z_1,\ldots,z_n]$ as an ideal of $\mathbb{Z}[z_1,\ldots,z_n]$, given generators $f_1,\ldots,f_m \in \mathbb{Z}[...

I have now today seen several questions (this and this) which asks for feedback on research articles, rather than stating explictit questions. There is of course a gray zone, but I wonder a bit what ...

I've created a new proposal on Area 51 for a Stack Exchange focusing on the history of mathematics and science. As a math student, I am constantly studying the history of the subject. I feel that ...

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 ...

In the spirit of The 7 Essential Meta Questions of Every Beta I realized that there were a few things that needed to be decided by a large site that has suddenly gone SE 2.0. Initially I planned to ...

We frequently have questions that are crossposted, e.g. https://mathoverflow.net/questions/137414/systems-of-parameters-for-algebra-a#question. The only options for now are to close as off-topic, ...

This question: Is SO(4) a subgroup of SU(3)? has already attracted 5 rude spam answers (most of which have been deleted by the time I posted this, but if you have enough reputation you can see them). ...

One highly off-topic question of real analysis was asked in the main site by a new user. One user sent, 1 hour later, a long answer going far beyond the the question, and then, 12 hours later, edited ...

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 ...

Typically, Stack Exchange sites have the restriction that only users with at least 5 reputation points on the main site can post on meta. In this regard, MathOverflow is different. (It is listed also ...