David Treumann's user avatar
David Treumann's user avatar
David Treumann's user avatar
David Treumann
  • Member for 14 years, 5 months
  • Last seen more than 5 years ago
28 votes
3 answers
4k views

How do I compare the different notions of Fourier transform for sheaves?

13 votes
4 answers
3k views

What are CR manifolds like?

22 votes
2 answers
3k views

What is the relationship between integrable systems and toric degenerations?

13 votes
4 answers
1k views

How often does suspension define an action of Z/2 on a category of module spectra?

28 votes
2 answers
1k views

Is there a geometric realization of $\mathbf{C}((t))$-varieties?

11 votes
1 answer
1k views

What functor does a Schubert variety represent?

11 votes
2 answers
1k views

When does a quasicoherent sheaf vanish?

17 votes
2 answers
1k views

What are some triangulations of Grassmannians?

7 votes
2 answers
973 views

What are the possible images of a square under an area-preserving map?

5 votes
2 answers
799 views

What kind of line bundles have Chern class of Hodge type (2,0) or (0,2)?

20 votes
0 answers
769 views

Is the determinant of cohomology a TQFT?

17 votes
0 answers
716 views

Is there an approach to Gabber's theorem from the singular support of coherent sheaves?

15 votes
1 answer
715 views

Is there anything significant about GAP's SmallGroup(512,2045)?

10 votes
0 answers
667 views

Is endoscopy interesting in simply-laced cases?

11 votes
2 answers
646 views

How many chromatic polynomials of planar maps are there?

10 votes
2 answers
618 views

When does a cubic surface pass through five lines?

2 votes
2 answers
606 views

What is the spinor genus of the Leech lattice?

18 votes
1 answer
541 views

Is there a cotangent bundle of a stable $\infty$-category?

7 votes
0 answers
539 views

Topological obstructions to extending algebraic vector bundles

8 votes
2 answers
509 views

What's in the genus of the cubic lattice?

13 votes
0 answers
364 views

What is the cup-product structure like on a hyperbolic 5-manifold?

7 votes
1 answer
300 views

On the ordered set of real numbers, does sheaf+cosheaf imply constant?

2 votes
1 answer
261 views

Is mean width a Dehn invariant?

1 vote
0 answers
220 views

What is deforming this non-complete intersection like?

2 votes
1 answer
161 views

What if the low-degree cohomology of a $G$-module and all its restrictions vanish?

3 votes
0 answers
142 views

Does a polytope have a self-indexing shelling?

1 vote
0 answers
131 views

What are some standard operations on the set of localizations of a triangulated category?

1 vote
0 answers
95 views

What is combinatorially possible, for a singular minimal surface in $\mathbf{R}^3$?