# Tag Info

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

This is an old and self-indulgent story; but it was such a charmingly unexpected bonus from my early use of MathOverflow, that I think it deserves to be recorded somewhere (my apologies for its length!...

### 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. ...
Accepted

### Can I ask a question on MathOverflow and also on another site?

Cross-posting is discouraged in general, because it can lead to duplication of effort by people answering on different sites. However, it is appropriate under some circumstances. Most of the advice ...
• 54k

### Editing etiquette

Most of the time, the edits that I see on MO are respectfully and tactfully performed and small in scope, and gratefully received by the post's author as improvements. Occasionally though I see flare-...
• 51.3k

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

The analog of the famous law of iterated logarithm for maximum eigenvalue of a random Gaussian matrix was asked here. Zeitouni's MO-answer was expanded (after significant effort) to a full answer for ...

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

As acknowledged in my note Explicit additive decomposition of norms on $\mathbb{R}^2$, it was sparked by answers by Noam D. Elkies and Suvrit Sra on MathOverflow Absolute value inequality for complex ...

### 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 ...

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

This MO question was the starting point for a joint work with Tao Mei where we study radial multipliers on the von Neumann algebras of hyperbolic groups. The paper is entitled Complete boundedness of ...

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

Keith Kearnes, together with co-authors Emil Kiss and Ágnes Szendrei, recently published a solution to Varieties where every algebra is free in this arxiv preprint. They prove a result under an even ...

### 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 ...

### 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.

### 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 ...

### 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 ...

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

This paper, Roman Karasev, Jan Kynčl, Pavel Paták, Zuzana Safernová, and Martin Tancer. "Bounds for Pach's selection theorem and for the minimum solid angle in a simplex." arXiv:1403.8147 (2014). ...

### 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.) ...

### 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 ...

### 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 ...

### 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 ...

### 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 ...

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

The answer to the question Length of Hirzebruch continued fractions was published as a short note On continued fractions of equal length .

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

Yoav Kallus gave interesting improvement in “The Two Sheriffs” puzzle. It is not a serious open problem but he gave a really surprizing answer using Fano plane.

### 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".

### 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.

### 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 ...

### 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.

### 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 ...

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

The paper, "A quantitative obstruction to collapsing surfaces," by Mikahil G. Katz, arXiv abs, addresses the MO question, "Gromov-Hausdorff limits of 2-dimensional Riemannian surfaces" posed by sva (S....