User xir

10 votes

1 answer

565 views

How to write K-theory Conner-Floyd Chern classes in terms of Adams operations?

asked Oct 9, 2018 at 3:51

10 votes

0 answers

149 views

Is there some precise way in which modular cocycle $c/(c\tau +d)$ "is" the generator of $H^1(\mathcal{M}_{ell}, \omega^2) \cong \mathbb{Z}/12$?

asked Mar 12, 2021 at 2:20

9 votes

1 answer

517 views

Is there a fibration sequence of spectra $K\mathbb{F}_q\to KU\to KU$?

asked Dec 6, 2018 at 22:51

8 votes

1 answer

670 views

Why can Euler systems constructed from algebraic cycles only be anticyclotomic?

asked Dec 22, 2019 at 4:02

7 votes

1 answer

786 views

What are the modularity properties of Weierstrass sigma function?

asked May 15, 2019 at 19:37

7 votes

1 answer

1k views

What's special about elliptic cohomology?

asked Sep 24, 2018 at 20:42

7 votes

2 answers

423 views

Can one make sense of de Rham cohomology for the complement of a (dense) irrational flow on the torus?

asked Aug 1, 2022 at 4:06

6 votes

0 answers

344 views

Moduli interpretation of Hirzebruch-Zagier divisors

asked Sep 23, 2020 at 19:08

6 votes

2 answers

969 views

Ring structures on algebraic K-theory spectrum, and its non-connective counterpart

asked May 1, 2018 at 0:16

6 votes

1 answer

299 views

Jacobi forms and Kato's modular units

asked Jun 2, 2020 at 0:41

6 votes

1 answer

234 views

Canonical reference for dictionary between $G$-spaces and fiber bundles over $BG$?

asked Jul 4, 2023 at 20:15

5 votes

1 answer

235 views

Gysin isomorphism in de Rham cohomology using currents

asked Jul 13, 2023 at 17:32

5 votes

0 answers

243 views

Explicit construction of abelian wild inertial extensions of maximal tamely ramified extension of $\mathbb{Q}_p$?

asked Oct 6, 2019 at 22:59

5 votes

0 answers

67 views

Does the theorem that genera vanishing on even-dim complex projective bundles are elliptic also apply for integral-valued genera?

asked Oct 18, 2018 at 2:31

5 votes

1 answer

491 views

When is it possible to localize a scheme along a closed subscheme?

asked Aug 21, 2022 at 23:20

4 votes

0 answers

285 views

Modular forms on $\Gamma(N)$

asked Mar 30, 2021 at 17:22

4 votes

0 answers

255 views

de Rham Bloch-Ogus theory in positive characteristic

asked Jun 29, 2021 at 18:36

4 votes

1 answer

441 views

Motivic cohomology of rigid analytic spaces

asked Jul 12, 2021 at 0:58

4 votes

0 answers

118 views

When is the degree $(2,2)$ motivic cohomology generated by products of units?

asked Jun 24, 2022 at 0:59

4 votes

0 answers

198 views

Canonical differential on K3 surface

asked May 26, 2018 at 3:07

4 votes

0 answers

229 views

Does $\text{Bun}_G$ have the homotopy type of a classifying space in positive characteristic?

asked Dec 5, 2019 at 17:07

4 votes

1 answer

566 views

Question about an implication of Thomason's étale descent spectral sequence

asked Aug 15, 2019 at 4:24

4 votes

1 answer

505 views

When is a formal group smooth?

asked Jun 3, 2020 at 20:05

3 votes

1 answer

573 views

Understanding moduli of shtukas of non-minuscule cocharacter

asked May 6, 2020 at 22:41

3 votes

0 answers

292 views

Equivalence of formulations of Ihara's lemma

asked Feb 8, 2018 at 0:01

3 votes

1 answer

250 views

Cohomology of commutative monoid acting on module

asked May 4, 2021 at 16:41

3 votes

1 answer

121 views

Non-holomorphicity of Hecke regularization of weight-2 level-1 Eisenstein series

asked Aug 29, 2022 at 20:19

3 votes

1 answer

337 views

Understanding the implementation of the $p$-adic(?) sigma function in SageMath

asked Feb 7, 2021 at 0:50

3 votes

1 answer

220 views

Index and weight of Weierstrass $\sigma$-function as a Jacobi form, versus a statement in a note by Zagier

asked Mar 11, 2021 at 22:13

3 votes

1 answer

170 views

Simplicial set from all orderings of simplicial complex

asked Mar 13, 2023 at 19:09

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52 Questions

How to write K-theory Conner-Floyd Chern classes in terms of Adams operations?

Is there some precise way in which modular cocycle $c/(c\tau +d)$ "is" the generator of $H^1(\mathcal{M}_{ell}, \omega^2) \cong \mathbb{Z}/12$?

Is there a fibration sequence of spectra $K\mathbb{F}_q\to KU\to KU$?

Why can Euler systems constructed from algebraic cycles only be anticyclotomic?

What are the modularity properties of Weierstrass sigma function?

What's special about elliptic cohomology?

Can one make sense of de Rham cohomology for the complement of a (dense) irrational flow on the torus?

Moduli interpretation of Hirzebruch-Zagier divisors

Ring structures on algebraic K-theory spectrum, and its non-connective counterpart

Jacobi forms and Kato's modular units

Canonical reference for dictionary between $G$-spaces and fiber bundles over $BG$?

Gysin isomorphism in de Rham cohomology using currents

Explicit construction of abelian wild inertial extensions of maximal tamely ramified extension of $\mathbb{Q}_p$?

Does the theorem that genera vanishing on even-dim complex projective bundles are elliptic also apply for integral-valued genera?

When is it possible to localize a scheme along a closed subscheme?

Modular forms on $\Gamma(N)$

de Rham Bloch-Ogus theory in positive characteristic

Motivic cohomology of rigid analytic spaces

When is the degree $(2,2)$ motivic cohomology generated by products of units?

Canonical differential on K3 surface

Does $\text{Bun}_G$ have the homotopy type of a classifying space in positive characteristic?

Question about an implication of Thomason's étale descent spectral sequence

When is a formal group smooth?

Understanding moduli of shtukas of non-minuscule cocharacter

Equivalence of formulations of Ihara's lemma

Cohomology of commutative monoid acting on module

Non-holomorphicity of Hecke regularization of weight-2 level-1 Eisenstein series

Understanding the implementation of the $p$-adic(?) sigma function in SageMath

Index and weight of Weierstrass $\sigma$-function as a Jacobi form, versus a statement in a note by Zagier

Simplicial set from all orderings of simplicial complex