User Dennis Sullivan - MathOverflow

Dennis Sullivan

Member for 11 years, 2 months
Last seen more than 2 years ago

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16 Answers

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7 votes

Any finite simplicial complex has the homotopy type of an algebraic variety

answered Sep 29, 2020 at 11:08

3 votes

History of the notion of $(G,X)$-structure

answered Apr 1, 2020 at 14:39

8 votes

History of the notion of $(G,X)$-structure

answered Mar 30, 2020 at 2:08

11 votes

(Stable) homotopy groups of Quillen plus construction

answered Dec 15, 2019 at 12:15

14 votes

Topological cobordisms between smooth manifolds

answered Dec 13, 2019 at 7:57

9 votes

Status of PL topology

answered Oct 25, 2018 at 1:28

27 votes

What is torsion in differential geometry intuitively?

answered Apr 15, 2018 at 3:48

17 votes

Mixed Hodge structure on the rational homotopy type

answered May 31, 2017 at 1:59

24 votes

Is there a complex structure on the 6-sphere?

answered Apr 4, 2016 at 2:55

3 votes

"Average" Voronoi diagrams without probability?

answered Dec 11, 2015 at 4:27

6 votes

Measure of chords from a cantor set

answered Oct 6, 2015 at 4:14

9 votes

Accepted

first Chern class of complex vector bundles and first Pontrjagin class of quaternionic vector bundles

answered Oct 6, 2015 at 4:01

13 votes

Are there 'cohomology' functors that respect all Eilenberg-Steenrod axioms except homotopy invariance?

answered Nov 30, 2014 at 12:46

11 votes

how to construct an oriented double cover of a lamination?

answered Nov 2, 2014 at 3:26

16 votes

Poincare duality and the $A_\infty$ structure on cohomology

answered Jun 25, 2013 at 19:02

26 votes

Nontrivial finite group with trivial group homologies?

answered Feb 10, 2013 at 22:44