Timo Schürg's user avatar
Timo Schürg's user avatar
Timo Schürg's user avatar
Timo Schürg
  • Member for 14 years, 5 months
29 votes
1 answer
2k views

Why is Riemann-Roch for stacks so hard?

22 votes
1 answer
2k views

Motivic Cohomology vs. Chow for singular varieties?

15 votes
4 answers
2k views

When is a scheme a zero-set of a section of a vector bundle?

13 votes
2 answers
2k views

Obstruction bundle for spaces with Kuranishi structure

8 votes
3 answers
1k views

When does f-nef imply nef (after twisting?)

8 votes
0 answers
441 views

Lifting sections of bundles

6 votes
1 answer
239 views

Forgetting and tensoring up for very connective maps of $E_{\infty}$-rings

6 votes
4 answers
892 views

Does every projective A/I-module come from A?

5 votes
2 answers
1k views

Does a closed immersion of an affine scheme in a smooth scheme factor over an open affine subscheme?

5 votes
1 answer
538 views

Does adding degeneracies to a semi-simplicial diagram change the homotopy colimit?

2 votes
1 answer
319 views

k-th Chow Group and k-th graded part of K_0 ismorphic for DM-stacks?