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Dennis Sullivan

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16 Answers

Votes Activity Newest

Nontrivial finite group with trivial group homologies?

Feb 10 '13 at 22:44

Is there a complex structure on the 6-sphere?

Apr 4 '16 at 2:55

Mixed Hodge structure on the rational homotopy type

May 31 '17 at 1:59

What is torsion in differential geometry intuitively?

Apr 15 '18 at 3:48

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

Jun 25 '13 at 19:02

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

Nov 30 '14 at 12:46

(Stable) homotopy groups of Quillen plus construction

Dec 15 '19 at 12:15

how to construct an oriented double cover of a lamination?

Nov 2 '14 at 3:26

Topological cobordisms between smooth manifolds

Dec 13 '19 at 7:57

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

Oct 6 '15 at 4:01

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

Mar 30 at 2:08

Status of PL topology

Oct 25 '18 at 1:28

Measure of chords from a cantor set

Oct 6 '15 at 4:14

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

Sep 29 at 11:08

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

Apr 1 at 14:39

“Average” Voronoi diagrams without probability?

Dec 11 '15 at 4:27

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16 Answers