Piotr Achinger's user avatar
Piotr Achinger's user avatar
Piotr Achinger's user avatar
Piotr Achinger
  • Member for 14 years, 1 month
  • Last seen this week
6 votes
Accepted

Criteria for when Gauss-Manin sheaves are vector bundles

7 votes
Accepted

Finitely generated $\mathbb{Z}$-algebra embeds into unramified $p$-adic ring

4 votes

Adic generic fiber of a small formal scheme in the sense of Faltings

9 votes

On some finiteness properties for schemes

9 votes
Accepted

Is anything known about de Rham $K(\pi,1)$'s?

5 votes
Accepted

"Non-algebraic" Berkovich spaces

2 votes

Explicit tensor product of isocrystals

2 votes

Application of valuative criterion

7 votes

Frobenius pushforward of an equivariant tautological bundle on the flag variety

4 votes
Accepted

Subsheaves of a locally free sheaf on $P^{d}$

5 votes
Accepted

On the noetherianess of some subalgebras of an affinoid algebra

18 votes
Accepted

Is every smooth projective variety contained in a chain of smooth projective varieties of increasing dimension?

19 votes
Accepted

Does every map from a noetherian ring to a valuation ring factor through a DVR?

3 votes

Is it true that $\operatorname{2-colim}_U \textsf{QCoh}(U) = \textsf{Vect}(K_X)$, as $U$ shrinks to the generic point?

6 votes

Does p-adic etale cohomology know the variety has ordinary reduction or not?

3 votes

Derived categories of coherent sheaves: suggested references?

11 votes

Étale fundamental group of rigid analytification

11 votes
Accepted

Pushforward of line bundle under "toric isogeny"

10 votes

Embedding torsors of elliptic curves into projective space

5 votes

Explicit example de Rham moduli space of connections

2 votes
Accepted

Open affine subscheme of a direct limit of smooth algebras

1 vote
Accepted

Flatness of $\Omega^1_{X/S}$

1 vote
Accepted

Geometric line bundles on the Tate curve

6 votes

CY fibration over $\mathbb P^1$ without any singular fibers

22 votes
Accepted

How to motivate constructible sheaves

-1 votes

Representability of flat cohomology by a group scheme

4 votes
Accepted

Tangent Space of the Hodge bundle on the moduli space of curves

5 votes
Accepted

Local rings $R \subsetneq S$ with $R$ regular and $S$ Cohen-Macaulay, non-regular

2 votes
Accepted

Automorphisms of Frobenius liftings and degeneration of the Hodge-de Rham spectral sequence

15 votes
Accepted

Canonical lift of the deformation of an ordinary abelian variety

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