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, 5 months
  • Last seen this week
12 votes
1 answer
252 views

Flag manifolds as incidence correspondences

12 votes
1 answer
267 views

Most points on a degree $p$ hypersurface?

12 votes
2 answers
470 views

Lattice structure in the root poset

12 votes
1 answer
516 views

Are there nonobvious cases where equations have finitely many algebraic integer solutions?

11 votes
1 answer
595 views

Do Richardson varieties have rational singularities in arbitrary characteristic?

11 votes
0 answers
524 views

Cubic fields correspond to $3$-torsion ideals in quadratic fields, or to order $3$ characters of quadratic class groups?

11 votes
0 answers
1k views

Total spaces of tangent/cotangent bundles in a course where all varieties are quasi-projective

11 votes
5 answers
2k views

Relation between indefinite quadratic forms and continued fractions

11 votes
1 answer
738 views

Motivation behind Kac's notation for affine root systems

11 votes
2 answers
374 views

When is the poset of acyclic orientations of a graph a lattice?

11 votes
2 answers
1k views

Schur's Lemma for Hilbert spaces

11 votes
3 answers
434 views

Easy proof that reflections generate $N(T)/T$ for connected compact group?

10 votes
1 answer
226 views

Distribution of good diophantine approximations

10 votes
1 answer
448 views

Why is the root poset is graded by height?

10 votes
0 answers
333 views

Easy cases of Herbrand's theorem

10 votes
2 answers
433 views

A category of spaces in which $\mathbb{R}_{>0}$ is not isomorphic to $\mathbb{R}$

10 votes
4 answers
1k views

Reference for working with the implicit function theorem

10 votes
2 answers
391 views

Counting points on varieties of low codimension

10 votes
2 answers
1k views

Cone shaped solutions to wave equation

10 votes
0 answers
385 views

Can I compute the cohomology of the complement of a log canonical divisor as if it were normal crossings?

9 votes
0 answers
334 views

Is it decidable whether a finite type scheme is proper?

9 votes
2 answers
669 views

Potential connected non-Lie subgroup

8 votes
3 answers
1k views

Singularity of sparse random matrices

8 votes
7 answers
3k views

Pronunciation: Crapo

8 votes
1 answer
535 views

Is tensor product exact in abelian tensor categories with duals?

8 votes
2 answers
215 views

Flipping Hilbert series of semigroup rings

8 votes
2 answers
804 views

What is the affinization of M_g?

8 votes
0 answers
514 views

Lower semicontinuity of naive fiber size

8 votes
3 answers
452 views

Computing determinants of matrices of linear forms

8 votes
2 answers
724 views

Asymptotic question about time ordered exponentials