User dorebell

28 votes

1 answer

2k views

Is there a "Langlands philosophy" reason for the fact that the L-function of the Jacobi theta function is (almost) the Riemann zeta function?

asked Mar 26, 2017 at 7:48

24 votes

1 answer

2k views

Why are Lagrangian submanifolds called Lagrangian?

asked Nov 8, 2016 at 20:39

12 votes

3 answers

2k views

Why do we need a transitive model in forcing arguments?

asked Jul 13, 2016 at 6:38

11 votes

1 answer

721 views

What is the precise relationship between forcing on a poset and the topos of double-negation sheaves on this poset?

asked May 16, 2017 at 9:47

9 votes

2 answers

438 views

Topological Derivation of Leray Spectral Sequence

asked Feb 11, 2016 at 22:53

8 votes

1 answer

822 views

Does complex multiplication for higher dimensional abelian varieties give some generalization of class field theory?

asked Jul 18, 2016 at 6:16

7 votes

1 answer

2k views

Can we define exterior derivatives using pushforwards and connections?

asked Oct 7, 2016 at 3:27

6 votes

1 answer

2k views

Algebraic vs. homological equivalence for curves on a smooth complex projective surface

asked Oct 12, 2016 at 6:17

6 votes

1 answer

2k views

When do surjective morphisms induce injective maps on global sections of coherent sheaves?

asked Nov 30, 2016 at 6:08

5 votes

0 answers

415 views

Can the transcendence degree differ from the Krull dimension for the pluricanonical ring of a variety?

asked Dec 1, 2016 at 10:03

5 votes

1 answer

763 views

An integral domain of dimension one with a non-trivial infinite intersection of prime ideals

asked Apr 4, 2015 at 9:01

5 votes

1 answer

511 views

What is the relationship between the $\ell$-adic cohomology of a DM stack and that of its coarse moduli space?

asked Sep 27, 2018 at 20:16

5 votes

1 answer

511 views

General existence theorem for cup products

asked Dec 12, 2017 at 13:57

5 votes

2 answers

2k views

Can a non-trivial effective divisor on a (not necessarily smooth) variety be numerically trivial?

asked Feb 14, 2017 at 22:05

4 votes

0 answers

606 views

"Elementary" Proof that the divisor class group of varieties over finite fields is finite

asked Mar 28, 2018 at 0:17

4 votes

2 answers

493 views

Krull dimension of completions in non-noetherian setting (especially completed perfections)

asked Jan 16, 2019 at 0:04

4 votes

1 answer

600 views

Calculating Homology of the Boundary of a Handlebody

asked Aug 21, 2015 at 2:18

3 votes

0 answers

243 views

Does the link of a hypersurface singularity determine its analytic type?

asked May 4, 2016 at 7:08

3 votes

1 answer

524 views

When is the gradient of a Hamiltonian function a Liouville vector field?

asked Dec 13, 2016 at 5:56

3 votes

1 answer

191 views

Reference request - existence of formal solutions for integrable connections

asked Feb 21, 2019 at 21:39

2 votes

1 answer

172 views

Why is the set of parabolic reductions of a G-torsor E bijective to the set of parabolic subgroups of Aut(E)?

asked May 6, 2020 at 7:16

2 votes

0 answers

267 views

Relationship between coherent toposes/coherent logic and coherent sheaves

asked Mar 25, 2015 at 4:32

1 vote

1 answer

996 views

Torsion in the (co-)homology of a smooth projective variety - what is known in general?

asked Aug 13, 2015 at 0:21

1 vote

0 answers

210 views

A (second-order) axiomatic characterization of the integers which rules out surreal/hyperreal versions

asked Jul 28, 2016 at 5:44

1 vote

1 answer

1k views

Example of an integral scheme which is geometrically connected but not geometrically irreducible

asked Aug 22, 2017 at 10:34

0 votes

0 answers

48 views

Counting zero-sum subsets of a finite field with a particular form

asked Apr 27 at 20:07

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26 Questions

Is there a "Langlands philosophy" reason for the fact that the L-function of the Jacobi theta function is (almost) the Riemann zeta function?

Why are Lagrangian submanifolds called Lagrangian?

Why do we need a transitive model in forcing arguments?

What is the precise relationship between forcing on a poset and the topos of double-negation sheaves on this poset?

Topological Derivation of Leray Spectral Sequence

Does complex multiplication for higher dimensional abelian varieties give some generalization of class field theory?

Can we define exterior derivatives using pushforwards and connections?

Algebraic vs. homological equivalence for curves on a smooth complex projective surface

When do surjective morphisms induce injective maps on global sections of coherent sheaves?

Can the transcendence degree differ from the Krull dimension for the pluricanonical ring of a variety?

An integral domain of dimension one with a non-trivial infinite intersection of prime ideals

What is the relationship between the $\ell$-adic cohomology of a DM stack and that of its coarse moduli space?

General existence theorem for cup products

Can a non-trivial effective divisor on a (not necessarily smooth) variety be numerically trivial?

"Elementary" Proof that the divisor class group of varieties over finite fields is finite

Krull dimension of completions in non-noetherian setting (especially completed perfections)

Calculating Homology of the Boundary of a Handlebody

Does the link of a hypersurface singularity determine its analytic type?

When is the gradient of a Hamiltonian function a Liouville vector field?

Reference request - existence of formal solutions for integrable connections

Why is the set of parabolic reductions of a G-torsor E bijective to the set of parabolic subgroups of Aut(E)?

Relationship between coherent toposes/coherent logic and coherent sheaves

Torsion in the (co-)homology of a smooth projective variety - what is known in general?

A (second-order) axiomatic characterization of the integers which rules out surreal/hyperreal versions

Example of an integral scheme which is geometrically connected but not geometrically irreducible

Counting zero-sum subsets of a finite field with a particular form