User Stabilo

9 votes

1 answer

694 views

Is this theorem on $L$-functions known?

asked Apr 21, 2015 at 15:01

8 votes

1 answer

641 views

Property of the trace on finitely generated projective modules

asked Apr 18, 2019 at 14:36

8 votes

0 answers

584 views

Scholze and Weinstein's $\operatorname{Spa}\mathbf{Z}_p\times \operatorname{Spa}\mathbf{Z}_p$

asked Sep 5, 2021 at 9:45

6 votes

2 answers

345 views

Are finite projective modules over $R[t]$ free when $R$ is DVR?

asked Jun 11, 2021 at 6:13

6 votes

1 answer

499 views

If $M\otimes_S T$ is an $A$-module, is $M$ an $A$-module?

asked Mar 4, 2021 at 19:02

6 votes

1 answer

480 views

Twisted modular forms of half-integral weight

asked Nov 1, 2016 at 16:26

5 votes

0 answers

248 views

The existence of the Drinfeld shtuka function

asked Jun 6, 2017 at 15:21

5 votes

1 answer

392 views

Does anyone recognize this exponential sum?

asked Apr 24, 2016 at 20:42

5 votes

0 answers

139 views

Does the Gauss sum attached to $\chi$ ever belong to $\mathbb{Q}(\chi)$?

asked Mar 8, 2019 at 22:34

5 votes

1 answer

400 views

When is $\mathcal{D}(\mathcal{F}):\mathcal{D}(\mathcal{A})\to \mathcal{D}(\mathcal{B})$ fully faithful?

asked Jan 13, 2020 at 15:16

5 votes

0 answers

160 views

Extension groups in quotient categories

asked Aug 16, 2021 at 13:08

5 votes

1 answer

291 views

Do there exist elliptic curves over $H_K$ having everywhere good reduction and CM by $\mathcal{O}_K$?

asked May 26, 2022 at 15:31

4 votes

1 answer

249 views

Can one bypass the geometric realization in the definition of algebraic $K$-theory?

asked Aug 4, 2023 at 13:23

4 votes

1 answer

460 views

Perverse sheaves on the complex affine line

asked Oct 12, 2021 at 9:58

4 votes

0 answers

318 views

Is the restriction of an injective sheaf on a closed subscheme still injective?

asked Apr 12, 2021 at 12:52

4 votes

1 answer

237 views

What are the consequences of the finite generation of $\operatorname{Ext}^1_{\mathcal{O}_F}(\mathbb{1},M)$?

asked Dec 4, 2020 at 15:14

4 votes

0 answers

130 views

Morphism of distinguished triangles where one of the arrows is a quasi-isomorphism

asked Jul 24, 2020 at 13:43

4 votes

1 answer

350 views

$X(\mathbb{Z}/p\mathbb{Z})$ versus $\{X(\mathbb{Z})\pmod{p}\}$

asked May 3, 2019 at 14:29

3 votes

0 answers

211 views

Étale endomorphism of $\operatorname{GL}_n$ surjective over an algebraic closure

asked Jul 1, 2019 at 10:28

3 votes

0 answers

281 views

How do I obtain Vandermonde identity from Weyl's denominator formula?

asked Apr 21, 2017 at 10:40

3 votes

0 answers

446 views

Sheaf cohomology on the formal completion of $\mathbb{P}^1_k$ at its north pole

asked Dec 7, 2020 at 14:15

3 votes

0 answers

256 views

Multivariate Weierstrass preparation Theorem?

asked Dec 12, 2019 at 11:27

3 votes

1 answer

360 views

Derived Hom without injectives nor projectives

asked May 23, 2022 at 18:56

3 votes

0 answers

162 views

Multiplicative structure on Čech–Alexander complexes

asked Mar 17 at 13:20

2 votes

0 answers

112 views

Cone of a morphism of complexes that are concentrated in degree $0$ and $1$

asked Aug 24, 2020 at 16:06

2 votes

1 answer

441 views

Does $R\hat{f}_\mathcal{F}=\hat{f}_\mathcal{F}$ hold for affine adic morphisms?

asked Apr 18, 2021 at 15:08

2 votes

0 answers

82 views

What is the isomorphism from $\operatorname{Ext}^1_{T}(Y,X)$ to $\operatorname{Ext}_T(\mathbf{1},X\otimes Y^{\vee})$?

asked Apr 2, 2021 at 8:22

2 votes

2 answers

748 views

Lower bound for the number of representations of integers as sum of squares

asked May 29, 2016 at 11:55

2 votes

1 answer

234 views

Glueing modules over $\{x\}\times \operatorname{Spec} R$

asked Jul 15, 2019 at 10:05

1 vote

0 answers

154 views

Mixed Hodge structures over $F\otimes \mathbb{R}$

asked Sep 6, 2019 at 13:20

Stack Exchange Network

43 Questions

Is this theorem on $L$-functions known?

Property of the trace on finitely generated projective modules

Scholze and Weinstein's $\operatorname{Spa}\mathbf{Z}_p\times \operatorname{Spa}\mathbf{Z}_p$

Are finite projective modules over $R[t]$ free when $R$ is DVR?

If $M\otimes_S T$ is an $A$-module, is $M$ an $A$-module?

Twisted modular forms of half-integral weight

The existence of the Drinfeld shtuka function

Does anyone recognize this exponential sum?

Does the Gauss sum attached to $\chi$ ever belong to $\mathbb{Q}(\chi)$?

When is $\mathcal{D}(\mathcal{F}):\mathcal{D}(\mathcal{A})\to \mathcal{D}(\mathcal{B})$ fully faithful?

Extension groups in quotient categories

Do there exist elliptic curves over $H_K$ having everywhere good reduction and CM by $\mathcal{O}_K$?

Can one bypass the geometric realization in the definition of algebraic $K$-theory?

Perverse sheaves on the complex affine line

Is the restriction of an injective sheaf on a closed subscheme still injective?

What are the consequences of the finite generation of $\operatorname{Ext}^1_{\mathcal{O}_F}(\mathbb{1},M)$?

Morphism of distinguished triangles where one of the arrows is a quasi-isomorphism

$X(\mathbb{Z}/p\mathbb{Z})$ versus $\{X(\mathbb{Z})\pmod{p}\}$

Étale endomorphism of $\operatorname{GL}_n$ surjective over an algebraic closure

How do I obtain Vandermonde identity from Weyl's denominator formula?

Sheaf cohomology on the formal completion of $\mathbb{P}^1_k$ at its north pole

Multivariate Weierstrass preparation Theorem?

Derived Hom without injectives nor projectives

Multiplicative structure on Čech–Alexander complexes

Cone of a morphism of complexes that are concentrated in degree $0$ and $1$

Does $R\hat{f}_\mathcal{F}=\hat{f}_\mathcal{F}$ hold for affine adic morphisms?

What is the isomorphism from $\operatorname{Ext}^1_{T}(Y,X)$ to $\operatorname{Ext}_T(\mathbf{1},X\otimes Y^{\vee})$?

Lower bound for the number of representations of integers as sum of squares

Glueing modules over $\{x\}\times \operatorname{Spec} R$

Mixed Hodge structures over $F\otimes \mathbb{R}$