User Angelo

9 votes

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What's a good dense open of $\bar{M}_g,n(X,\beta)$?

answered Oct 22, 2010 at 7:59

9 votes

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Grothendieck's Galois theory without finiteness hypotheses

answered Jul 17, 2011 at 16:12

9 votes

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locally constant constructible sheaves and finite etale coverings

answered Jul 4, 2011 at 4:10

9 votes

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Genealogy of the Lagrange inversion theorem

answered May 21, 2010 at 15:37

9 votes

Is anything known about the enumeration of degree d, genus g curves in CP^2 where g >1 ?

answered Aug 14, 2010 at 9:40

9 votes

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Seeking examples or proof: injectivity of Cartan homomorphism for commutative rings?

answered Jun 11, 2010 at 6:08

9 votes

What are the merits of the different finiteness conditions on quasi-coherent sheaves?

answered May 9, 2010 at 10:01

9 votes

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When is the intersection of an isolated normal singularity with a generic linear subspace through that singularity normal?

answered May 20, 2013 at 20:20

9 votes

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Top chern class under finite, unramified, dominant morphism

answered Jan 20, 2013 at 12:56

9 votes

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Stability condition for vector bundles

answered Jan 17, 2012 at 19:33

9 votes

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Does $S$ being a free rank-$n$ $R$-algebra imply that $S/R$ is free rank $n-1$?

answered Feb 20, 2012 at 20:37

9 votes

Bialynicki-Birula decomposition of a non-singular quasi-projective scheme.

answered Apr 20, 2012 at 12:43

8 votes

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Chern classes of vector bundles on a stack

answered Jun 1, 2012 at 20:28

8 votes

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Noetherian descent extension for a given ring

answered Nov 27, 2011 at 17:06

8 votes

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pullback diagram of principal bundles

answered Jul 27, 2011 at 14:32

8 votes

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Automorphism groups of general type varieties

answered Jan 21, 2013 at 16:55

8 votes

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Commutativity of the Chow ring in positive characteristic

answered Jan 25, 2013 at 17:35

8 votes

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A criterion for freeness over a local ring

answered Apr 4, 2013 at 16:00

8 votes

Equivalence versus Isomorphism of Categories

answered Jun 30, 2010 at 11:08

8 votes

Generators of a maximal ideal of $k[X_1,\cdots,X_n]$

answered May 25, 2010 at 14:13

8 votes

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Are the arithmetic genera of Cohen-Macaulay curves in a fixed homology class bounded?

answered May 5, 2010 at 19:33

8 votes

Example of a smooth morphism where you can't lift a map from a nilpotent thickening?

answered Apr 21, 2010 at 8:50

8 votes

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Jordan Curve Theorem for Manifolds

answered Jun 11, 2011 at 13:51

8 votes

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Are associated bundles representable in schemes?

answered Aug 6, 2011 at 15:50

8 votes

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Automorphism groups and etale topological stacks

answered May 8, 2011 at 11:56

8 votes

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More on universal homeomorphisms

answered Mar 20, 2011 at 12:38

8 votes

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Is the pre-image of a regular subscheme with respect to a universal homeomorphism of regular schemes regular?

answered Mar 20, 2011 at 14:09

8 votes

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Under what hypotheses are schematic fixed points of a flat deformation themselves flat?

answered Oct 25, 2010 at 14:25

8 votes

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Are schematic fixed-points of a Cohen-Macaulay scheme Cohen-Macaulay?

answered Oct 27, 2010 at 5:55

8 votes

Integral closure of a regular ring

answered Sep 15, 2010 at 16:05

Stack Exchange Network

266 Answers

What's a good dense open of $\bar{M}_g,n(X,\beta)$?

Grothendieck's Galois theory without finiteness hypotheses

locally constant constructible sheaves and finite etale coverings

Genealogy of the Lagrange inversion theorem

Is anything known about the enumeration of degree d, genus g curves in CP^2 where g >1 ?

Seeking examples or proof: injectivity of Cartan homomorphism for commutative rings?

What are the merits of the different finiteness conditions on quasi-coherent sheaves?

When is the intersection of an isolated normal singularity with a generic linear subspace through that singularity normal?

Top chern class under finite, unramified, dominant morphism

Stability condition for vector bundles

Does $S$ being a free rank-$n$ $R$-algebra imply that $S/R$ is free rank $n-1$?

Bialynicki-Birula decomposition of a non-singular quasi-projective scheme.

Chern classes of vector bundles on a stack

Noetherian descent extension for a given ring

pullback diagram of principal bundles

Automorphism groups of general type varieties

Commutativity of the Chow ring in positive characteristic

A criterion for freeness over a local ring

Equivalence versus Isomorphism of Categories

Generators of a maximal ideal of $k[X_1,\cdots,X_n]$

Are the arithmetic genera of Cohen-Macaulay curves in a fixed homology class bounded?

Example of a smooth morphism where you can't lift a map from a nilpotent thickening?

Jordan Curve Theorem for Manifolds

Are associated bundles representable in schemes?

Automorphism groups and etale topological stacks

More on universal homeomorphisms

Is the pre-image of a regular subscheme with respect to a universal homeomorphism of regular schemes regular?

Under what hypotheses are schematic fixed points of a flat deformation themselves flat?

Are schematic fixed-points of a Cohen-Macaulay scheme Cohen-Macaulay?

Integral closure of a regular ring