Ying Zhang's user avatar
Ying Zhang's user avatar
Ying Zhang's user avatar
Ying Zhang
  • Member for 14 years, 4 months
  • Last seen more than a month ago
2 votes
0 answers
213 views

The etale cohomology``ring" structure of torsion sheaves on varieties

4 votes
1 answer
642 views

Lemmas on etale cohomology with compact support from the book 'Arithmetic Duality Theorems'

1 vote
0 answers
517 views

Collection of sub line bundles of a vector bundle

3 votes
2 answers
602 views

Toric automorphism of P1 times P1 blown up at four pts

5 votes
1 answer
381 views

Deforming ample line bundles vs cohomology group

4 votes
0 answers
776 views

Some trivial questions on Tate's conjectures

6 votes
2 answers
452 views

Immerse an affine schemes into $A^n_S$

9 votes
3 answers
3k views

Is the tensor product of regular rings still regular

10 votes
3 answers
1k views

Looking for reference on Serre's talk "linear rep and number of points mod p"

5 votes
1 answer
297 views

Which covers of Lie groups will I get

4 votes
3 answers
1k views

Does reduced+Noetherian space imply Noetherian scheme

3 votes
1 answer
440 views

An exercise in group cohomology

21 votes
5 answers
6k views

Maps inducing zero on homotopy groups but are not null-homotopic

9 votes
3 answers
5k views

How many primes stay inert in a finite (non-cyclic) extension of number fields?

6 votes
5 answers
4k views

Why is the rank of a locally free sheaf well-defined?