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Answers
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5
When does local invertibility imply invertibility?
17
Class number measuring the failure of unique factorization
2
Extending vector bundles on a given open subscheme, reprise
11
Characteristic zero and characteristic $p$ in algebraic geometry
0
Relatively ample line bundles
8
Is there a connected $k$-group scheme $G$ such that $G_{red}$ is not a subgroup?
9
injectivity of the pull-back via a finite map
8
Is reflexivity an open condition?
13
Blow up along codimension one closed subscheme
4
Algebraic and Holomorphic Functions
4
How to compute the Picard rank of a K3 surface?
8
Bialynicki-Birula decomposition of a non-singular quasi-projective scheme.
8
Existence of points on varieties which avoid a given number field.
9
Finite map from quasi-projective variety
7
Irreducible divisors containing an arbitrary closed set
10
A line bundle that does not admit a G-linearisation
8
Complex structures on a K3 surface as a hyperkähler manifold
1
Compactifiable morphisms
5
Line bundles on a pointless curve
10
On condition when the push-forward of coherent sheaf is locally free
2
Reference needed for negative curves on blowup of the projective plane at generic points
9
Localizing at the primitive polynomials?
5
Can a non-trivial action of a connected group on a reduced scheme be trivial on a dense open?
8
Spectrum and scheme of the commutative group-algebra of an abelian group.
4
Parameter space for complete intersections and their discriminant
1
Explicit equation of Dickson invariant / quasideterminant / special orthogonal group over the integers
12
Kodaira dimension of symmetric products of curves
5
When does dimension behave nicely for quotients of affine algebraic varieties by the action of a group?
4
flatness criterion on normal bases
3
surjectivity of rational points induced by surjective map from affine space
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