Piotr Achinger
  • Member for 11 years, 11 months
  • Last seen this week
2 answers
20 votes
2k views
11 bookmarks
Frobenius splitting and derived Cartier isomorphism
1 answers
17 votes
1k views
5 bookmarks
Existence of non-split vector bundles on smooth projective varieties
0 answers
16 votes
953 views
4 bookmarks
Homology classes of subvarieties of toric varieties
1 answers
15 votes
736 views
8 bookmarks
Are deformations of a scheme some kind of a "derived gerbe" under the cotangent complex?
1 answers
15 votes
1k views
4 bookmarks
$\infty$-operads and $E_\infty$-algebras
0 answers
15 votes
2k views
6 bookmarks
Why was it so difficult to define the relative de Rham-Witt complex?
0 answers
14 votes
493 views
6 bookmarks
(When) is isomorphism on differentials enough to guarantee that a map is étale?
0 answers
13 votes
467 views
2 bookmarks
When does an $E_\infty$ algebra come from a commutative differential graded algebra?
1 answers
13 votes
1k views
5 bookmarks
Frobenius splitting of Fano varieties
2 answers
13 votes
1k views
8 bookmarks
Fixed Point Property in Algebraic Geometry
1 answers
12 votes
405 views
1 bookmarks
Can a covering space of the $p$-adic disc split over the circle?
0 answers
12 votes
381 views
2 bookmarks
Zariski vs etale torsors over abelian varieties
0 answers
10 votes
190 views
1 bookmarks
Quasi-separated rigid-analytic space without a formal model?
4 answers
10 votes
2k views
3 bookmarks
Cohomology of line bundles
1 answers
9 votes
256 views
3 bookmarks
Good reduction of rational surfaces
2 answers
8 votes
1k views
8 bookmarks
Algebraic definition of the Kuranishi map
1 answers
8 votes
878 views
2 bookmarks
Serre duality and Hirzebruch-Riemann-Roch in the non-projective case
3 answers
8 votes
439 views
2 bookmarks
Laurent polynomials with constant term of their $(p-1)$-st power congruent to one modulo $p$
1 answers
7 votes
396 views
1 bookmarks
Can we normalize a complex analytic space in a covering of an open subset?
1 answers
7 votes
663 views
2 bookmarks
Can one prove that toric varieties are Cohen-Macaulay by finding a regular sequence?
5 answers
7 votes
767 views
2 bookmarks
Principal bundles over groups
1 answers
6 votes
291 views
Homotopy cosheaf?
1 answers
6 votes
625 views
Locally constant constructible vs locally constant
1 answers
6 votes
233 views
2 bookmarks
Does there exist a relative compactification with flat boundary?
1 answers
5 votes
436 views
3 bookmarks
Is the ring $\mathbb{Z}_p [[x]]\otimes_{\mathbb{Z}_p} \overline{\mathbb{Q}}_p$ Noetherian?
1 answers
5 votes
832 views
3 bookmarks
Picard groups of abelian étale covers
1 answers
5 votes
344 views
2 bookmarks
Structure of iterated $\mathbb{P}^1$-bundles
1 answers
4 votes
900 views
1 bookmarks
Formal criterion of flatness
2 answers
4 votes
404 views
2 bookmarks
Exceptional collections and cohomological criteria for isomorphism
5 answers
3 votes
1k views
5 bookmarks
What properties define open loci in families?