51
votes

### How can we attract more grad students?

I'll go against my best judgement and will reply to this with my own perception.
First of all, the best thing would be to ask graduate students directly. I don't know if there are any active efforts ...

29
votes

### What do you want to do in Rio?

If you have an excuse to mention MO in your abstract, please consider doing so. MO is mentioned in the paper I submitted for the proceedings and it will appear in one slide of my talk at the ICM.

21
votes

### Best of MathOverflow, or papers inspired by MathOverflow

My MO question Conjugation of group extensions was answered by YCor. As a result, we wrote a joint note
Conjugate complex homogeneous spaces with non-isomorphic fundamental groups published in C. R. ...

Community wiki

18
votes

### How can we attract more grad students?

I don't believe MO can do anything to make most grad students comfortable posting here. It wouldn't be compatible with the culture of the site or how its users see it (and some of the comments on this ...

16
votes

Accepted

### MO in the Notices of the AMS

The Opinion column "Mathematical Community" in the March 2011 issue, by John Swallow, asks, "Are mathematicians at the forefront of collaboration, with the advent of the Polymath Projects and Math ...

15
votes

Accepted

### Is there a way to measure the effectiveness of MO?

A lot of MathOverflow data is already available publicly.
An anonymized version of the entire Stack Exchange Network database is archived every few weeks and permanently on archive.org. It's easy to ...

14
votes

### Best of MathOverflow, or papers inspired by MathOverflow

A nice question by Michael Hardy, How many rearrangements must fail to alter the value of a sum before you conclude that none do?, led to a recent 6-author collaboration, 5 or 6 of whom are MO patrons ...

Community wiki

12
votes

### Examples of mathematical exposition arising from MO answers

This paper resulted from a question on mathoverflow. This monograph on properties of 3-manifold groups has now appeared in print.

12
votes

### How can we attract more grad students?

I'm writing this answer as a (pseudo)-grad student who is comfortable using the site, having no real publications or positions under my belt.
Disclaimer: Generally I try to avoid using the pronoun 'I' ...

11
votes

### Best of MathOverflow, or papers inspired by MathOverflow

In 2013 John Pardon solved the Hilbert-Smith conjecture for group actions on 3-manifolds.
Lemma 2.17 of the paper was based on the answer to this mathoverflow question. I was quite surprised to ...

Community wiki

11
votes

### Best of MathOverflow, or papers inspired by MathOverflow

Mohammad Ghomi answered
the question
Shortest closed curve to inspect a sphere,
in a paper, Shortest closed curve to inspect a sphere, posted to the arXiv (https://arxiv.org/abs/2010.15204),
whose PDF ...

Community wiki

11
votes

### Best of MathOverflow, or papers inspired by MathOverflow

The MO question, "Shortest closed curve to inspect a sphere,"
was cited as the "initial stimulus" for the paper
Mohammad Ghomi, "The length, width,and inradius of space curves,"
(PDF download.)
...

Community wiki

10
votes

### Best of MathOverflow, or papers inspired by MathOverflow

Hannah Cairns's proof of Perron's theorem (discussed in this MathOverflow question) has been published in The American Mathematical Monthly as Perron’s Theorem in an Hour.

Community wiki

10
votes

### Best of MathOverflow, or papers inspired by MathOverflow

The full answer to the question Decidability of diophantine equation in a theory by rainmaker in the case of Robinson’s arithmetic was written up in my paper Division by zero, Archive for Mathematical ...

Community wiki

10
votes

### Best of MathOverflow, or papers inspired by MathOverflow

An unpublished open problem posed by Adam Chalcraft, Does every polyomino tile $\mathbb R^n$ for some $n$?, received considerable attention when I posted it here on MO. (Of all the questions that I ...

Community wiki

10
votes

### Best of MathOverflow, or papers inspired by MathOverflow

Not sure if my recent paper "Equivalence: an attempt at a history of the idea" qualifies as one of the "best of Mathoverflow or papers inspired by Mathoverflow". But I am sure Mathoverflow was a force ...

Community wiki

9
votes

### Best of MathOverflow, or papers inspired by MathOverflow

Julien Marché's question "Homology generated by lifts of simple curves" was the first appearance in print of a folklore question (I first was asked it back when I was a postdoc). As I discuss in my ...

Community wiki

9
votes

### Examples of mathematical exposition arising from MO answers

The note "Did a 1-dimensional magnet detect a 248-dimensional Lie algebra?" by David Borthwick and Skip Garibaldi mentioned in this MO answer by Garibaldi was published here in the Notices of the AMS.

9
votes

### Examples of mathematical exposition arising from MO answers

My preprint arXiv:1609.01160 was written in response to Question 248665.

9
votes

### How can we attract more grad students?

This is a very difficult question. However, I think that we could attract more graduate students (actually, more people in general) following three lines of action. Many of these things have been ...

8
votes

### Best of MathOverflow, or papers inspired by MathOverflow

My Forum of Mathematics Sigma paper (published 2021) answered a 20-year old question of Jeff Shallit. The proof makes crucial use of ideas in a 2016 MO answer by Anthony Quas.

Community wiki

8
votes

### Best of MathOverflow, or papers inspired by MathOverflow

Joachim König has answered my question
Order of products of elements in symmetric groups
in his paper A note on the product of two permutations of prescribed orders,
to appear in European Journal of ...

Community wiki

7
votes

### Best of MathOverflow, or papers inspired by MathOverflow

This paper addresses and partially solves a question posed by Matthew Kahle,
whose MO question they explicitly cite:
chromatic number of the hyperbolic plane.
DeCorte, Evan, and Konstantin Golubev....

Community wiki

7
votes

### Best of MathOverflow, or papers inspired by MathOverflow

The paper "Majority colourings of digraphs" by Paul Seymour, Stephan Kreutzer, Sang-il Oum, David R. Wood and myself has its origin in my question "Majority coloring for directed graphs".

Community wiki

7
votes

### Best of MathOverflow, or papers inspired by MathOverflow

This paper of mine (Arithmetic Restrictions on Geometric Monodromy) was inspired in large part by this question asked by Lisa S., though the original motivation is not so obvious in the final product.

Community wiki

7
votes

### Best of MathOverflow, or papers inspired by MathOverflow

The discussion initiated by my question
Primes occurring as orders of elements of a finitely presented group
led to the addition of Section 5 to:
Maurice Chiodo, On torsion in finitely presented ...

Community wiki

7
votes

### Best of MathOverflow, or papers inspired by MathOverflow

Leonardo Zapponi has answered my question
Parametric solutions of Pell's equation
in his paper Parametric solutions of Pell equations.

Community wiki

7
votes

### Best of MathOverflow, or papers inspired by MathOverflow

Quoting Oscar Cunningham's answer to an MO question asking for decision problems that are not known to be decidable:
In Conway's Game of Life, the problem of deciding whether a given pattern with ...

Community wiki

7
votes

### Best of MathOverflow, or papers inspired by MathOverflow

This doesn't quite fit the mold of the other postings, but Matt Parker
(Numberphile
and StandUpMaths)
made
a YouTube video
that mentions MathOverflow
several times, and particularly highlights the ...

Community wiki

6
votes

### Best of MathOverflow, or papers inspired by MathOverflow

Zhi-Wei Sun posted a highly upvoted MO question in 2018, Can we write each positive rational number as ${1\over p_1−1}+\cdots+{1\over p_k−1}$ with $p_1,\ldots,p_k$ distinct primes? The question ...

Community wiki

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