User Zhiyu

26 votes

1 answer

959 views

What automorphic forms are expected to occur in the zeta function of moduli space of curves?

asked Jan 23, 2019 at 17:29

22 votes

2 answers

1k views

$GL_n(\Bbb Z_p)$ conjugacy classes in a $GL_n(\Bbb Q_p)$ conjugacy class

asked Nov 9, 2018 at 22:04

17 votes

1 answer

792 views

Can Yoneda lemma for smooth projective varieties only use curves?

asked Dec 30, 2019 at 18:15

15 votes

0 answers

721 views

If a polynomial ring is a finite flat module over some subring, is that subring itself a polynomial ring?

asked Aug 27, 2018 at 18:22

14 votes

3 answers

1k views

Existence of non-null-homotopic map from $M^n$ to $S^{n-1}$

asked Jul 14, 2018 at 15:27

14 votes

8 answers

2k views

Applications of the idea of deformation in algebraic geometry and other areas?

asked Mar 26, 2019 at 2:04

13 votes

0 answers

502 views

Hensel lemma and rational points in complete noetherian local ring

asked Dec 10, 2018 at 21:15

12 votes

0 answers

265 views

Mixed characteristic analogue of algebraicity of the diagonal of two-variable power series?

asked Feb 3, 2019 at 16:33

12 votes

2 answers

461 views

Noetherian local ring and the growth of $\dim_k \operatorname{Ext}^i(k,k)$

asked Oct 31, 2018 at 3:03

12 votes

0 answers

555 views

Representation theory of finite groups with additional structures

asked May 2, 2018 at 17:40

12 votes

2 answers

776 views

Distinguish smooth affine algebraic group by its underlying variety

asked Dec 23, 2019 at 17:13

12 votes

1 answer

418 views

When does a locally symmetric space have no odd degree Betti numbers?

asked Oct 8, 2019 at 6:28

11 votes

2 answers

1k views

Why is Langlands functoriality usually related with period integral in a third group?

asked Nov 12, 2019 at 20:38

11 votes

1 answer

398 views

Finiteness of $H_1 \backslash G / H_2$ and the geometry of the orbits

asked Jun 2, 2019 at 19:40

11 votes

2 answers

1k views

mod p etale cohomology of the special fiber and the generic fiber

asked Sep 27, 2018 at 21:00

11 votes

0 answers

201 views

Modular version of Mednykh's formula?

asked Oct 23, 2018 at 22:56

10 votes

1 answer

256 views

Iteration of a morphism and flatness

asked Aug 31, 2018 at 18:18

10 votes

1 answer

376 views

Numbers of solutions equal on every finite commutative ring

asked Nov 14, 2017 at 5:58

10 votes

0 answers

217 views

Subvarieties with isomorphic complements

asked Oct 4, 2019 at 20:46

10 votes

0 answers

219 views

Recover the field from its Milnor K-groups

asked Jan 9, 2020 at 6:43

9 votes

1 answer

446 views

Group cohomology of modular representations for finite groups of Lie type

asked Jan 6, 2020 at 18:45

9 votes

0 answers

475 views

Classification of finite flat group schemes over integers?

asked Jun 8, 2019 at 23:25

9 votes

1 answer

751 views

Nontrivial p-divisible groups over $\mathbb Z$ for general prime $p$

asked Nov 21, 2018 at 6:26

9 votes

1 answer

448 views

Structure of the variety of $n$-tuples of $m \times m$ matrices with zero product

asked Jun 25, 2019 at 3:51

9 votes

3 answers

809 views

Number of points of the nilpotent cone over a finite field and its cohomology

asked May 26, 2018 at 12:15

8 votes

1 answer

796 views

Tate modules of commutative group schemes over finite field

asked Apr 21, 2018 at 15:38

8 votes

0 answers

221 views

Projective modules over maximal orders of central simple algebras

asked Nov 8, 2018 at 4:19

8 votes

1 answer

310 views

Restriction of irreducible representations from $G(\mathbb Q_p)$ to $[G, G](\mathbb Q_p)$

asked Sep 2, 2019 at 1:47

8 votes

1 answer

686 views

The (possibly negative) integers arising from sum of elements in any column of the character table

asked Dec 27, 2019 at 17:53

7 votes

1 answer

977 views

Applications of $h$-topology and $h$-descent

asked May 12, 2019 at 14:25

Stack Exchange Network

96 Questions

What automorphic forms are expected to occur in the zeta function of moduli space of curves?

$GL_n(\Bbb Z_p)$ conjugacy classes in a $GL_n(\Bbb Q_p)$ conjugacy class

Can Yoneda lemma for smooth projective varieties only use curves?

If a polynomial ring is a finite flat module over some subring, is that subring itself a polynomial ring?

Existence of non-null-homotopic map from $M^n$ to $S^{n-1}$

Applications of the idea of deformation in algebraic geometry and other areas?

Hensel lemma and rational points in complete noetherian local ring

Mixed characteristic analogue of algebraicity of the diagonal of two-variable power series?

Noetherian local ring and the growth of $\dim_k \operatorname{Ext}^i(k,k)$

Representation theory of finite groups with additional structures

Distinguish smooth affine algebraic group by its underlying variety

When does a locally symmetric space have no odd degree Betti numbers?

Why is Langlands functoriality usually related with period integral in a third group?

Finiteness of $H_1 \backslash G / H_2$ and the geometry of the orbits

mod p etale cohomology of the special fiber and the generic fiber

Modular version of Mednykh's formula?

Iteration of a morphism and flatness

Numbers of solutions equal on every finite commutative ring

Subvarieties with isomorphic complements

Recover the field from its Milnor K-groups

Group cohomology of modular representations for finite groups of Lie type

Classification of finite flat group schemes over integers?

Nontrivial p-divisible groups over $\mathbb Z$ for general prime $p$

Structure of the variety of $n$-tuples of $m \times m$ matrices with zero product

Number of points of the nilpotent cone over a finite field and its cohomology

Tate modules of commutative group schemes over finite field

Projective modules over maximal orders of central simple algebras

Restriction of irreducible representations from $G(\mathbb Q_p)$ to $[G, G](\mathbb Q_p)$

The (possibly negative) integers arising from sum of elements in any column of the character table

Applications of $h$-topology and $h$-descent