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SashaP
  • Member for 10 years, 7 months
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5 votes
0 answers
211 views

Belyi functions with prescribed image of a given point

3 votes
2 answers
346 views

Extension between vector bundles inducing non-zero map on cohomology

7 votes
0 answers
217 views

Albanese morphism induces an isomorphism on global $1$-forms

7 votes
0 answers
404 views

Failure of integral comparison between crystalline and de Rham cohomology over a highly ramified base

7 votes
0 answers
348 views

Arbitrarily non-degenerate Hodge to de Rham spectral sequence

23 votes
3 answers
1k views

Is the $H$-space structure on $S^7$ associative up to homotopy?

5 votes
1 answer
450 views

Isomorphism classes of sheaves which arise as extensions

3 votes
0 answers
173 views

Cohomology classes functorial under etale morphisms

9 votes
0 answers
850 views

Grothendieck's motivation of crystalline cohomology

1 vote
1 answer
188 views

Units in indefinite quaternionic algebra

3 votes
1 answer
436 views

Finite group of units in quaternion orders

32 votes
2 answers
2k views

Etale cohomology can not be computed by Cech

8 votes
0 answers
279 views

Functorial classes in Brauer group

7 votes
1 answer
535 views

Does Chabauty-Coleman method give an algorithm for finding rational points?

6 votes
2 answers
326 views

Multiplication in universal enveloping algebra in terms of PBW isomorphism

14 votes
0 answers
868 views

Local proof of Grothendieck-Riemann-Roch theorem

4 votes
1 answer
382 views

Non-vanishing of L-function of modular form

15 votes
3 answers
880 views

Lower central series quotients in terms of (co)homology

6 votes
1 answer
356 views

Lifting of Frobenius on torsors over abelian varieties

4 votes
1 answer
546 views

Lifting of Frobenius on semi-abelian varieties

4 votes
1 answer
238 views

$l$-dependence of the group of homologically zero cycles

6 votes
1 answer
727 views

Group laws in class field theory

3 votes
1 answer
528 views

Computation of Galois group

2 votes
1 answer
499 views

Representation of rationals by quadratic form

0 votes
1 answer
248 views

Equation in integers of irrational degree