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naf
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1 vote
0 answers
120 views

On the existence of non-arithmetic lattices in algebraic groups over $\mathbb{Q}$

9 votes
1 answer
275 views

A question related to Jordan's theorem on subgroups of $\mathrm{GL}_n(\mathbb{C})$

6 votes
0 answers
223 views

Rank $2$ motivic local systems on a curve

2 votes
1 answer
221 views

Singularities of contractions of extremal faces

9 votes
1 answer
710 views

Triviality of vector bundles on affine open subsets of affine space

2 votes
0 answers
66 views

Cohomology of compact open subgroups of semisimple groups over local fields

1 vote
1 answer
125 views

Triangularizability of induced $(\phi, \Gamma)$-modules

4 votes
1 answer
260 views

Is pseudo-rationality preserved by etale morphisms?

8 votes
0 answers
351 views

A criterion for rational singularities in mixed characteristic

9 votes
0 answers
420 views

What is the precise definition of "Hypergeometric motives over $\mathbb{Q}$"?

6 votes
2 answers
423 views

Representability of flat cohomology by a group scheme

8 votes
1 answer
297 views

An invariance property of rational singularities

8 votes
0 answers
256 views

Direct summands of a pushforward in the derived category of coherent sheaves

4 votes
0 answers
270 views

Irreducibility of the adjoint representation in positive characteristic

6 votes
1 answer
394 views

Flat maps and Zariski tangent spaces

11 votes
0 answers
391 views

Algebraizability of formal schemes

10 votes
1 answer
508 views

Orders of reductions of rational points on elliptic curves

9 votes
1 answer
504 views

Flatness and Cohen-Macaulay rings

10 votes
1 answer
489 views

Picard group of Drinfeld upper half space

5 votes
1 answer
512 views

Admissible subcategories of $D^b(\mathbb{P}^n)$

12 votes
0 answers
258 views

On the definition of LGP-monoids in IUT III

15 votes
2 answers
2k views

Fundamental groups of Calabi-Yau varieties

15 votes
2 answers
2k views

What is known about the MMP over non-algebraically closed fields

9 votes
2 answers
1k views

Stacks determined by their coarse moduli spaces