User Anatoly Preygel

25 votes

Accepted

Why is an injective quasi-coherent sheaf's restriction to an open subset still an injective object?

answered Nov 25, 2009 at 9:57

25 votes

Accepted

In what topology DM stacks are stacks

answered Feb 20, 2010 at 17:36

21 votes

Accepted

Where does the splitting principle come from and does it generalize

answered Apr 14, 2010 at 19:50

15 votes

Interdependence between A^1 homotopy theory and algebraic cobordism

answered Aug 25, 2010 at 22:00

15 votes

Algebraic de Rham cohomology vs. analytic de Rham cohomology

answered Mar 12, 2010 at 3:48

9 votes

H-space structure on infinite projective spaces

answered Jan 8, 2010 at 8:01

9 votes

Accepted

characterization of cofibrations in CW-complexes with G-action

answered Feb 20, 2010 at 7:30

9 votes

Derived categories of (coherent) sheaves of modules: exceptional images, gluing, and proper descent?

answered May 27, 2011 at 18:20

9 votes

Extraordinary cohomology as a derived functor?

answered Jul 17, 2010 at 2:46

8 votes

Gerbes for a cyclic group. (or maybe G_m too)

answered Nov 26, 2009 at 19:44

8 votes

Flatness of relative canonical bundle

answered Mar 16, 2010 at 17:10

7 votes

Cyclic spaces and S^1-equivariant homotopy theory

answered Dec 1, 2009 at 8:19

7 votes

Constructible sheaves and dg-modules

answered Sep 10, 2011 at 20:22

7 votes

Accepted

Can Deligne-Mumford stacks be characterized by their restriction to a small subcategory?

answered Oct 7, 2010 at 18:59

7 votes

How ugly is the isomorphism R[GxH] = R[G] (X) R[H] for groups G, H?

answered Jun 29, 2010 at 21:52

6 votes

Accepted

Whitehead Products without Base Points?

answered Feb 20, 2010 at 21:52

4 votes

Accepted

Homological smoothness implies projectivity?

answered Dec 29, 2013 at 22:32

3 votes

Proving interesting theorems about S_n using its character table.

answered Dec 2, 2010 at 6:43

Stack Exchange Network

18 Answers

Why is an injective quasi-coherent sheaf's restriction to an open subset still an injective object?

In what topology DM stacks are stacks

Where does the splitting principle come from and does it generalize

Interdependence between A^1 homotopy theory and algebraic cobordism

Algebraic de Rham cohomology vs. analytic de Rham cohomology

H-space structure on infinite projective spaces

characterization of cofibrations in CW-complexes with G-action

Derived categories of (coherent) sheaves of modules: exceptional images, gluing, and proper descent?

Extraordinary cohomology as a derived functor?

Gerbes for a cyclic group. (or maybe G_m too)

Flatness of relative canonical bundle

Cyclic spaces and S^1-equivariant homotopy theory

Constructible sheaves and dg-modules

Can Deligne-Mumford stacks be characterized by their restriction to a small subcategory?

How ugly is the isomorphism R[GxH] = R[G] (X) R[H] for groups G, H?

Whitehead Products without Base Points?

Homological smoothness implies projectivity?

Proving interesting theorems about S_n using its character table.