User Ryan Budney

6 votes

1 answer

631 views

Ricci flow + Nash embedding

asked Oct 18, 2023 at 18:40

5 votes

3 answers

207 views

First usage of the terms pseudo-isotopy and concordance in manifold theory

asked May 19, 2023 at 18:57

9 votes

1 answer

343 views

Mapping class groups are finitely generated

asked Jun 28, 2023 at 22:07

3 votes

0 answers

132 views

Isotopy-classes of oriented Schoenflies spheres in $S^4$ is a group under oriented connect-sum

asked Mar 24, 2023 at 0:19

81 votes

7 answers

7k views

Computational complexity of computing homotopy groups of spheres

asked Jul 8, 2010 at 7:37

7 votes

2 answers

2k views

Ideals in the ring of single-variable Laurent polynomials with integer coefficients

asked Jul 28, 2010 at 17:17

10 votes

4 answers

1k views

Operad terminology - Operads with and without O(0).

asked Jun 26, 2010 at 19:36

6 votes

4 answers

1k views

Generating ribbon diagrams for knots known to be ribbon knots

asked Dec 13, 2009 at 0:59

13 votes

1 answer

1k views

Mapping class groups of small Seifert-fibred 3-manifolds

asked Nov 16, 2013 at 22:08

5 votes

0 answers

129 views

Smoothing tame topological knots, from an analytic perspective

asked Apr 22, 2022 at 5:13

16 votes

5 answers

4k views

can you fool SnapPea?

asked Nov 10, 2009 at 20:39

20 votes

9 answers

3k views

Hironaka desingularisation theorem -- new proofs in literature?

asked Nov 8, 2009 at 5:42

58 votes

6 answers

7k views

Torsion in homology or fundamental group of subsets of Euclidean 3-space

asked Nov 7, 2009 at 1:14

12 votes

3 answers

1k views

Knot theory question: bridge number vs. min generators of fundamental group of complement

asked Jul 24, 2012 at 21:09

11 votes

1 answer

581 views

Revisiting Gordon-Luecke theorem

asked Sep 14, 2021 at 20:48

23 votes

2 answers

799 views

Which homotopy classes $S^3 \to S^2$ lift to embeddings $S^3 \to S^2 \times D^3$?

asked Jun 2, 2021 at 17:34

31 votes

3 answers

2k views

A Pachner complex for triangulated manifolds

asked Aug 9, 2010 at 23:32

24 votes

3 answers

2k views

Persistent homology of Gaussian fields in Euclidean space

asked Dec 4, 2012 at 20:40

6 votes

1 answer

312 views

Integrating the Riemann curvature tensor over a singular 2-disc

asked Mar 11, 2020 at 9:07

6 votes

1 answer

659 views

Do you recognise this variant of the cubes operad?

asked Aug 26, 2010 at 6:37

8 votes

0 answers

282 views

Smale's relative h-cobordism theorem

asked May 31, 2018 at 21:52

59 votes

9 answers

7k views

Has anyone thought about creating a formal proof wiki with verifier?

asked Oct 5, 2010 at 22:06

8 votes

0 answers

173 views

Stratification of space of labelled circles in the plane

asked Feb 10, 2018 at 22:50

12 votes

2 answers

538 views

Curvature flows for PL closed curves in the plane?

asked Sep 16, 2013 at 21:54

5 votes

2 answers

820 views

Historical question Cauchy-Crofton theorem vs. Radon transform

asked Nov 27, 2009 at 19:01

14 votes

0 answers

445 views

Structure of Gordian graph of knots

asked Nov 20, 2016 at 5:50

10 votes

0 answers

127 views

Compatibility of spherical and hyperbolic geometry for fibred knots

asked Mar 23, 2016 at 5:41

23 votes

2 answers

4k views

Isotopy extension theorems

asked Oct 23, 2013 at 15:01

22 votes

1 answer

1k views

Word problem for fundamental group of submanifolds of the 4-sphere

asked Jul 21, 2010 at 11:17

16 votes

3 answers

1k views

Looking for "large knot" examples

asked Sep 4, 2013 at 20:07

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55 Questions

Ricci flow + Nash embedding

First usage of the terms pseudo-isotopy and concordance in manifold theory

Mapping class groups are finitely generated

Isotopy-classes of oriented Schoenflies spheres in $S^4$ is a group under oriented connect-sum

Computational complexity of computing homotopy groups of spheres

Ideals in the ring of single-variable Laurent polynomials with integer coefficients

Operad terminology - Operads with and without O(0).

Generating ribbon diagrams for knots known to be ribbon knots

Mapping class groups of small Seifert-fibred 3-manifolds

Smoothing tame topological knots, from an analytic perspective

can you fool SnapPea?

Hironaka desingularisation theorem -- new proofs in literature?

Torsion in homology or fundamental group of subsets of Euclidean 3-space

Knot theory question: bridge number vs. min generators of fundamental group of complement

Revisiting Gordon-Luecke theorem

Which homotopy classes $S^3 \to S^2$ lift to embeddings $S^3 \to S^2 \times D^3$?

A Pachner complex for triangulated manifolds

Persistent homology of Gaussian fields in Euclidean space

Integrating the Riemann curvature tensor over a singular 2-disc

Do you recognise this variant of the cubes operad?

Smale's relative h-cobordism theorem

Has anyone thought about creating a formal proof wiki with verifier?

Stratification of space of labelled circles in the plane

Curvature flows for PL closed curves in the plane?

Historical question Cauchy-Crofton theorem vs. Radon transform

Structure of Gordian graph of knots

Compatibility of spherical and hyperbolic geometry for fibred knots

Isotopy extension theorems

Word problem for fundamental group of submanifolds of the 4-sphere

Looking for "large knot" examples