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David E Speyer's user avatar
David E Speyer's user avatar
David E Speyer's user avatar
David E Speyer
  • Member for 14 years, 9 months
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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 10 years of answers on MO. I do not feel obliged to respond to every comment I get.

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Top posts
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167
Most memorable titles
Oct 31, 2010
129
Why do primes dislike dividing the sum of all the preceding primes?
Feb 1, 2013
116
How did Cole factor $2^{67}-1$ in 1903?
May 22, 2015
109
Invertible matrices of natural numbers are permutations... why?
Apr 18, 2011
100
Irreducibility of polynomials in two variables
Feb 3, 2010
87
$\prod_{n=1}^{\infty} n^{\mu(n)}=\frac{1}{4 \pi ^2}$
Mar 12, 2013
84
Why could Mertens not prove the prime number theorem?
May 2, 2012
79
Applications of the Chinese remainder theorem
Dec 29, 2009
77
Conceptual reason why the sign of a permutation is well-defined?
Mar 8, 2022
74
What is Lagrange Inversion good for?
Jul 16, 2010
Top Meta posts
9
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31
What is our policy on asking about correctness of preprints?
29
Policy toward GPT-generated conjectures?
28
At what point should MO recognise it needs to leave Stack Exchange Inc?
27
What are our procedures if a user complains about harassment or abuse?
23
Request to keep an eye out for PROMYS admissions problems
Top network posts
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203
Evaluate $\int_0^1 \frac{\log \left( 1+x^{2+\sqrt{3}}\right)}{1+x}\mathrm dx$
183
How to find the Galois group of a polynomial?
101
Convergence of $\sqrt{n}x_{n}$ where $x_{n+1} = \sin(x_{n})$
99
Advantages of Mathematics competition/olympiad students in Mathematical Research
88
Different ways to prove $\sum_{k=1}^\infty \frac{1}{k^2}=\frac{\pi^2}{6}$ (the Basel problem)