User Angelo

8 votes

When is a scheme a zero-set of a section of a vector bundle?

answered Sep 30, 2010 at 12:47

7 votes

Accepted

Existence of non-zero sections

answered Oct 7, 2010 at 12:01

7 votes

Accepted

Convex varieties that are not homogeneous

answered Sep 20, 2010 at 14:40

7 votes

Accepted

Rational points of an algebraic space over finite field

answered Jan 2, 2011 at 17:41

7 votes

A question on base change

answered Dec 16, 2010 at 12:48

7 votes

Accepted

Extension of scalars and support of a non-finitely generated module

answered Dec 26, 2010 at 8:32

7 votes

The Poincare Bundle(s) on C \times J

answered May 11, 2010 at 4:55

7 votes

Accepted

Question about hypercohomology / spectral sequence of a complex of "almost-acyclic" sheaves

answered Apr 16, 2010 at 4:11

7 votes

Pullback of a nef divisor under a finite morphism.

answered Sep 12, 2010 at 4:14

7 votes

What is "Data" involved in a mathematical construction?

answered Apr 15, 2013 at 4:54

7 votes

Varieties which become isomorphic to algebraic groups over an algebraic closure

answered May 24, 2013 at 21:23

7 votes

Homological characterization of smooth maps

answered May 19, 2013 at 15:54

7 votes

Accepted

Do canonical stacks exist over Spec(Z)?

answered Feb 8, 2015 at 11:08

7 votes

Group cohomology of orthogonal groups with integer coefficient

answered Feb 17, 2013 at 22:26

7 votes

Accepted

On a morphism from the Brauer group to the Picard group

answered Jun 18, 2019 at 18:51

7 votes

Accepted

Properness of reductive group actions on smooth varieties

answered Jan 11, 2020 at 6:30

7 votes

quotient of integral polynomials not being integral

answered Sep 23, 2011 at 16:03

7 votes

Accepted

A vector bundle with a given jumping line

answered Nov 3, 2011 at 5:37

7 votes

Accepted

Codimension of points in fibered products

answered Nov 9, 2011 at 21:03

7 votes

Accepted

polynomial maps

answered Dec 18, 2011 at 15:38

7 votes

Accepted

line bundles and universal covers

answered Jul 24, 2012 at 21:26

7 votes

Accepted

Order of ring automorphisms of localizations of polynomial rings over finite fields

answered Jul 31, 2012 at 14:37

6 votes

Accepted

Independent vector fields

answered Aug 11, 2012 at 12:13

6 votes

Accepted

Is the class of $k$-gonal curves dominant

answered Jul 19, 2012 at 12:31

6 votes

Accepted

is the presheaf of automorphisms a sheaf?

answered Nov 11, 2011 at 4:57

6 votes

Serre's theorem on global generations on stacks

answered Mar 28, 2020 at 16:32

6 votes

Accepted

Is $H^i(\mathcal{M}_g,F)$ necessarily finite dimensional for a coherent sheaf $F$?

answered Sep 29, 2019 at 16:13

6 votes

Accepted

Spectral sequence for Ext

answered Aug 2, 2010 at 17:31

6 votes

Special divisors on hyperelliptic curves

answered Apr 21, 2010 at 7:29

6 votes

Making an intuition precise

answered Apr 13, 2010 at 6:03

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266 Answers

When is a scheme a zero-set of a section of a vector bundle?

Existence of non-zero sections

Convex varieties that are not homogeneous

Rational points of an algebraic space over finite field

A question on base change

Extension of scalars and support of a non-finitely generated module

The Poincare Bundle(s) on C \times J

Question about hypercohomology / spectral sequence of a complex of "almost-acyclic" sheaves

Pullback of a nef divisor under a finite morphism.

What is "Data" involved in a mathematical construction?

Varieties which become isomorphic to algebraic groups over an algebraic closure

Homological characterization of smooth maps

Do canonical stacks exist over Spec(Z)?

Group cohomology of orthogonal groups with integer coefficient

On a morphism from the Brauer group to the Picard group

Properness of reductive group actions on smooth varieties

quotient of integral polynomials not being integral

A vector bundle with a given jumping line

Codimension of points in fibered products

polynomial maps

line bundles and universal covers

Order of ring automorphisms of localizations of polynomial rings over finite fields

Independent vector fields

Is the class of $k$-gonal curves dominant

is the presheaf of automorphisms a sheaf?

Serre's theorem on global generations on stacks

Is $H^i(\mathcal{M}_g,F)$ necessarily finite dimensional for a coherent sheaf $F$?

Spectral sequence for Ext

Special divisors on hyperelliptic curves

Making an intuition precise