User Lukas Heger

12 votes

1 answer

656 views

What kind of arithmetic information does the ring of integers in an infinite extension carry?

asked Feb 4, 2018 at 0:15

11 votes

1 answer

660 views

HNN-extension as a 2-colimit

asked Feb 16, 2020 at 21:52

10 votes

0 answers

189 views

Is every UFD a filtered colimit of Noetherian UFDs?

asked May 1 at 10:58

7 votes

1 answer

361 views

Shouldn't we expect analytic (in the Berkovich sense) étale cohomology of a number field to be the cohomology of the Artin–Verdier site?

asked May 4 at 23:47

7 votes

1 answer

380 views

What properties do the categories $\mathbf{GrpMod}$ and $\mathbf{GrpMod}^*$ of compatible pairs have? Can we do homological algebra with them?

asked Dec 4, 2022 at 21:12

5 votes

1 answer

271 views

Do all finite-dimensional division algebras appear as Wedderburn factors of rational group rings?

asked May 31, 2018 at 1:03

5 votes

1 answer

611 views

What are the LCA groups that are the Pontryagin dual of a locally profinite abelian group?

asked Jun 11, 2018 at 18:23

4 votes

0 answers

164 views

What are the applications of $\lambda$-rings to class field theory?

asked Aug 5, 2022 at 18:07

2 votes

0 answers

343 views

Lifting irreducibility of polynomials over an integral domain to the quotient field

asked Feb 11, 2018 at 20:41

2 votes

0 answers

269 views

Is there any relation between Berkovich spaces over $\Bbb Z$ and Arakelov theory?

asked Sep 30, 2023 at 14:30

2 votes

0 answers

192 views

Modular forms and Petersson inner product via De Rham cohomology, Hodge filtration and cup products

asked Jul 15, 2022 at 20:40

1 vote

0 answers

125 views

Different ways to construct the isogeny category of abelian varieties

asked Mar 2, 2022 at 11:27

0 votes

0 answers

281 views

What can be said about the derived functor of a composition between unbounded derived categories?

asked Nov 25, 2022 at 21:09

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13 Questions

What kind of arithmetic information does the ring of integers in an infinite extension carry?

HNN-extension as a 2-colimit

Is every UFD a filtered colimit of Noetherian UFDs?

Shouldn't we expect analytic (in the Berkovich sense) étale cohomology of a number field to be the cohomology of the Artin–Verdier site?

What properties do the categories $\mathbf{GrpMod}$ and $\mathbf{GrpMod}^*$ of compatible pairs have? Can we do homological algebra with them?

Do all finite-dimensional division algebras appear as Wedderburn factors of rational group rings?

What are the LCA groups that are the Pontryagin dual of a locally profinite abelian group?

What are the applications of $\lambda$-rings to class field theory?

Lifting irreducibility of polynomials over an integral domain to the quotient field

Is there any relation between Berkovich spaces over $\Bbb Z$ and Arakelov theory?

Modular forms and Petersson inner product via De Rham cohomology, Hodge filtration and cup products

Different ways to construct the isogeny category of abelian varieties

What can be said about the derived functor of a composition between unbounded derived categories?