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user25309
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38 votes
1 answer
2k views

Why is there no Brauer scheme?

23 votes
1 answer
693 views

Del Pezzo surfaces and homotopy groups of spheres

20 votes
1 answer
712 views

Why is the CM closure of $\mathbb{Q}$ the "ultimate" coefficient field for motives?

20 votes
1 answer
1k views

Has the conformally field theoretic metric on a Calabi-Yau variety been proved to exist?

18 votes
0 answers
1k views

What is the Hochschild cohomology of the Fukaya-Seidel category?

17 votes
1 answer
1k views

What is the mirror of symplectic field theory?

12 votes
0 answers
810 views

Intrinsic definition of the weight filtration

11 votes
1 answer
497 views

Smoothness of the "Archimedean special fiber" in Arakelov geometry

11 votes
4 answers
720 views

Is there a non-abelian version of the Torelli map?

9 votes
2 answers
1k views

State of the art on a question on the existence of dualizing complex

8 votes
0 answers
347 views

Symplectic invariance of Hodge numbers?

7 votes
1 answer
666 views

What is the importance of the conjectural semi-simplicity of the action of the Frobenius on the etale cohomology of a variety over a finite field ?

6 votes
2 answers
1k views

triviality of determinant sheaf

4 votes
0 answers
166 views

Search for an example about relation between zeta functions and hodge numbers

4 votes
1 answer
324 views

What are the fixed points of the jacobian acting on the compactified jacobian ?

1 vote
0 answers
280 views

On presentations of algebraic stacks