Skip to main content
Mathematics
David E Speyer's user avatar
David E Speyer's user avatar
David E Speyer's user avatar
David E Speyer
  • Member for 15 years, 5 months
  • Last seen this week
Profile Activity

Stats

65,071
reputation
2.1m
reached
655
answers
21
questions
Communities
View all

About

Professor of Mathematics at the University of Michigan. My research interests are in combinatorial algebraic geometry, particularly Schubert calculus, matroids and cluster algebras. I also enjoy thinking about number theory and computational mathematics.

Disclaimer: I have >= 15 years of answers on MO. I will often not respond to comments on old answers. Sorry, there is a point where I need to limit how much time I put in.

Badges

View all badges
7
gold badges
199
silver badges
300
bronze badges

Top tags

View all tags
493
Score
75
Posts
11
Posts %
446
Score
67
Posts
10
Posts %
417
Score
67
Posts
10
Posts %
318
Score
33
Posts
5
Posts %
297
Score
61
Posts
9
Posts %
274
Score
46
Posts
7
Posts %

Top posts

View all questions and answers
212
Evaluate $\int_0^1 \frac{\log \left( 1+x^{2+\sqrt{3}}\right)}{1+x}\mathrm dx$
Jun 25, 2013
196
How to find the Galois group of a polynomial?
Apr 8, 2013
104
Convergence of $\sqrt{n}x_{n}$ where $x_{n+1} = \sin(x_{n})$
Aug 24, 2010
103
Advantages of Mathematics competition/olympiad students in Mathematical Research
Sep 17, 2010
93
Different ways to prove $\sum_{k=1}^\infty \frac{1}{k^2}=\frac{\pi^2}{6}$ (the Basel problem)
Oct 31, 2010
76
Is it morally right and pedagogically right to google answers to homework?
Sep 3, 2012
65
Evaluating the integral $\int_0^\infty \frac{\sin x} x \,\mathrm dx = \frac \pi 2$?
Feb 6, 2012
63
Convergence of $\sum \limits_{n=1}^{\infty}\sin(n^k)/n$
Aug 12, 2010
62
Can squares of infinite area always cover a unit square?
Dec 20, 2017
61
How do people come up with difficult math Olympiad questions?
Sep 27, 2012

Top Meta posts

13
27
62
Request for my id to be deleted
60
Request to keep an eye out for PROMYS admissions problems
41
Are questions of the form "has this ever been studied?" appropriate?
37
What is the relation between Latex and MathJax?
33
What do we do with users who post numerous unlabeled homework questions?

Top network posts

View all network posts
177
Most memorable titles
131
Why do primes dislike dividing the sum of all the preceding primes?
123
How did Cole factor $2^{67}-1$ in 1903?
113
Invertible matrices of natural numbers are permutations... why?
102
Irreducibility of polynomials in two variables