Angelo's user avatar
Angelo's user avatar
Angelo's user avatar
Angelo
  • Member for 14 years
  • Last seen this week
18 votes
Accepted

Stacks determined by their coarse moduli spaces

18 votes
Accepted

Is the complement of an affine variety always a divisor?

17 votes

To what extent is it true that "number theory = mathematics"?

17 votes
Accepted

non-locally trivial A^n bundles

17 votes
Accepted

Is $H^i(X,F)$ finitely generated over $\Gamma(O_X)$ if $F$ is coherent?

17 votes
Accepted

Factoriality: local or global?

16 votes
Accepted

Smooth variety contained in another smooth variety

15 votes
Accepted

flatness of power series rings

15 votes

What is the center of Qcoh(X)?

14 votes
Accepted

Non-dominant polynomial maps in the plane

14 votes

Duals of Abelian Categories

14 votes
Accepted

Cancellation problem for curves

14 votes
Accepted

Pushing Complex Structure Forward

14 votes
Accepted

Does the action of an affine group scheme preserve the nilradical of an algebra?

14 votes
Accepted

Diagonalizable subgroups of a connected linear algebraic group

14 votes
Accepted

Is the functor of open subschemes representable?

14 votes
Accepted

The composition of derived functors - commutation fails hazardly?

14 votes
Accepted

non-isomorphic stably isomorphic fields

14 votes

What is the minimal number of symmetric generators of the full matrix algebra?

13 votes
Accepted

Cohomologically trivial stacks

13 votes
Accepted

commuting elements in a reductive group

13 votes
Accepted

Degree of canonical bundle?

13 votes
Accepted

Is there a 'best' name for a group together with a set it acts on?

12 votes
Accepted

Irreducible component of a Cohen-Macaulay variety

12 votes
Accepted

n-th integral cohomology of a non-compact manifold of dimension n

12 votes
Accepted

When is a sheaf on a scheme extendable to a representable functor?

12 votes
Accepted

Is there a ``path'' between any two fiber functors over the same field in Tannakian formalism?

12 votes
Accepted

Is every (Artin/DM) algebraic stack fibered in sets an algebraic space?

12 votes

Consequences of not requiring ring homomorphisms to be unital?

12 votes

Extending vector bundles on a given open subscheme

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