User Dylan Thurston

63 votes

Math paper authors' order

answered Apr 1, 2010 at 5:58

49 votes

Elegant proof that any closed, oriented 3-manifold is the boundary of some oriented 4-manifold?

answered Apr 29, 2011 at 23:35

45 votes

Maps inducing zero on homotopy groups but are not null-homotopic

answered Apr 4, 2010 at 3:57

41 votes

What part is left unsolved in the Unknotting problem? (after results of Bar-Natan, Khovanov, Kronheimer and Mrowka)

answered Feb 27, 2016 at 13:02

27 votes

Accepted

Usefulness of using TQFTs

answered Apr 5, 2011 at 1:08

25 votes

Accepted

Who thought that the Alexander polynomial was the only knot invariant of its kind?

answered Apr 1, 2010 at 0:43

24 votes

What part is left unsolved in the Unknotting problem? (after results of Bar-Natan, Khovanov, Kronheimer and Mrowka)

answered Feb 28, 2016 at 15:53

21 votes

What are some reasonable-sounding statements that are independent of ZFC?

answered May 11, 2015 at 14:44

20 votes

Accepted

Does this knot invariant distinguish trefoil chiralities?

answered Apr 30, 2012 at 18:13

16 votes

Why is a 2d TQFT formulated as a functor?

answered Jun 2, 2011 at 2:30

15 votes

Accepted

Request: intermediate-level proof: every 2-homology class of a 4-manifold is generated by a surface.

answered Apr 25, 2010 at 15:08

14 votes

Examples of major theorems with very hard proofs that have not dramatically improved over time

answered Sep 11, 2015 at 17:08

12 votes

Accepted

Maslov index and Heegard Floer homology

answered Mar 29, 2012 at 12:53

11 votes

Accepted

Is the center of gravity in a CAT(0) space contained in the convex hull?

answered May 7, 2015 at 13:53

11 votes

Accepted

The preimage of the boundary morphism in the Mayer-Vietoris sequence

answered May 31, 2011 at 3:15

10 votes

HOMFLY and homology; also superalgebras

answered Apr 1, 2010 at 8:08

10 votes

Accepted

Wanted: differential coming from higher genus surface in Heegaard Floer homology

answered Mar 29, 2012 at 13:16

9 votes

Accepted

How many edge-disjoint paths go from upper left to lower right in a $4 \times N$ rectangular gridwork of streets?

answered Jan 3, 2011 at 16:37

8 votes

Accepted

Using higher-order Bring radicals to solve arbitrary polynomials

answered Apr 13, 2011 at 14:12

8 votes

Accepted

Area-preserving map between rectangles and fat polygons

answered Jun 1, 2011 at 20:34

8 votes

Accepted

Residual Finiteness of Fundamental Group of Compact 3-Manifold

answered Apr 14, 2011 at 10:27

8 votes

Details for the action of the braid group B_3 on modular forms

answered Apr 4, 2010 at 5:14

8 votes

What are the points of Spec(Vassiliev Invariants)?

answered Apr 1, 2010 at 7:49

8 votes

Accepted

Heegaard Floer homology of a genus two Heegaard splitting of $S^3$

answered Apr 8, 2022 at 23:20

7 votes

What is the state in the WRT TQFT associated to a handlebody?

answered May 25, 2016 at 16:49

7 votes

4-polytope with vertices at the binary octahedral group

answered May 7, 2015 at 20:30

7 votes

Accepted

Upper half plane quotient by a discrete group

answered Mar 30, 2010 at 6:27

6 votes

Stable graphs: Feynman diagrams and Deligne-Mumford space

answered Apr 25, 2010 at 15:56

6 votes

central extensions of Diff(S^1) and of the semigroup of annuli

answered Apr 13, 2011 at 23:28

6 votes

Do the results of (1/n)-surgery determine the link?...

answered Apr 2, 2011 at 20:04

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60 Answers

Math paper authors' order

Elegant proof that any closed, oriented 3-manifold is the boundary of some oriented 4-manifold?

Maps inducing zero on homotopy groups but are not null-homotopic

What part is left unsolved in the Unknotting problem? (after results of Bar-Natan, Khovanov, Kronheimer and Mrowka)

Usefulness of using TQFTs

Who thought that the Alexander polynomial was the only knot invariant of its kind?

What part is left unsolved in the Unknotting problem? (after results of Bar-Natan, Khovanov, Kronheimer and Mrowka)

What are some reasonable-sounding statements that are independent of ZFC?

Does this knot invariant distinguish trefoil chiralities?

Why is a 2d TQFT formulated as a functor?

Request: intermediate-level proof: every 2-homology class of a 4-manifold is generated by a surface.

Examples of major theorems with very hard proofs that have not dramatically improved over time

Maslov index and Heegard Floer homology

Is the center of gravity in a CAT(0) space contained in the convex hull?

The preimage of the boundary morphism in the Mayer-Vietoris sequence

HOMFLY and homology; also superalgebras

Wanted: differential coming from higher genus surface in Heegaard Floer homology

How many edge-disjoint paths go from upper left to lower right in a $4 \times N$ rectangular gridwork of streets?

Using higher-order Bring radicals to solve arbitrary polynomials

Area-preserving map between rectangles and fat polygons

Residual Finiteness of Fundamental Group of Compact 3-Manifold

Details for the action of the braid group B_3 on modular forms

What are the points of Spec(Vassiliev Invariants)?

Heegaard Floer homology of a genus two Heegaard splitting of $S^3$

What is the state in the WRT TQFT associated to a handlebody?

4-polytope with vertices at the binary octahedral group

Upper half plane quotient by a discrete group

Stable graphs: Feynman diagrams and Deligne-Mumford space

central extensions of Diff(S^1) and of the semigroup of annuli

Do the results of (1/n)-surgery determine the link?...