User David Carchedi - MathOverflow

David Carchedi

Member for 14 years, 1 month
Last seen more than 3 years ago

math.gmu.edu/~dcarched
Bonn

113 Questions

Score Activity Newest Views

3 votes

3 answers

470 views

Ultrafilters containing the image of a filter

asked May 10, 2010 at 22:30

3 votes

1 answer

636 views

When does the left-adjoint to a geometric morphism preserve epis?

asked Mar 30, 2010 at 18:36

3 votes

0 answers

336 views

Colimit of an etale diagram of schemes

asked Jun 22, 2010 at 15:43

3 votes

2 answers

611 views

Cartesian cubes and groupoids

asked Mar 12, 2012 at 23:49

3 votes

1 answer

176 views

Which limits are preserved by prolongation of presheaves?

asked May 8, 2012 at 14:28

3 votes

0 answers

142 views

Which limits are preserved by a reflective left-adjoint?

asked May 8, 2012 at 15:04

3 votes

2 answers

336 views

Cohomology of the interior of a zero set of a smooth function

asked Nov 16, 2011 at 17:03

3 votes

2 answers

420 views

Approximating smooth functions with polynomials subject to constraints.

asked Dec 8, 2011 at 18:43

3 votes

0 answers

131 views

When does prolongation preserve sheaves?

asked Jul 7, 2014 at 13:47

2 votes

0 answers

221 views

When can I compute the simplicial mapping space from a presheaf to a simplicial presheaf naively?

asked Jul 10, 2014 at 16:31

2 votes

2 answers

428 views

When do zero-simplices of a simplicial diagram determine its homotopy colimit?

asked Nov 28, 2014 at 3:13

2 votes

1 answer

119 views

Actions of compact Lie groups on (possibly but hopefully not) non-regular spaces

asked Aug 8, 2013 at 21:13

2 votes

0 answers

203 views

Faithful actions of finite groups on topological spaces

asked May 10, 2011 at 17:37

2 votes

1 answer

211 views

Shrinkable maps and universal weak equivalences

asked May 15, 2011 at 0:01

2 votes

0 answers

345 views

On small generators of an infinity category

asked May 19, 2012 at 1:30

2 votes

1 answer

295 views

Do Cartesian fibrations preserve pullbacks?

asked Jun 25, 2012 at 0:09

2 votes

3 answers

311 views

Are fibrations coreflective in a 2-category?

asked Oct 27, 2010 at 1:18

2 votes

0 answers

77 views

Characterizing local homeomorphisms into an exponent

asked Oct 6, 2010 at 9:52

2 votes

1 answer

393 views

Weak colimits of weak and strict presheaves in groupoids

asked Oct 13, 2010 at 15:31

1 vote

1 answer

207 views

When do maps of ineffective orbifolds descend to their effective part?

asked Nov 13, 2010 at 22:23

1 vote

2 answers

261 views

Name for a functor with this property?

asked Oct 17, 2010 at 23:02

1 vote

1 answer

1k views

Ultrafilters containing a principal filter

asked Apr 26, 2010 at 16:41

1 vote

1 answer

145 views

Coproducts compute with finite limits in a reflective subcategoroy?

asked May 9, 2012 at 0:37

4