User HJRW

33 votes

4 answers

2k views

Can a connected planar compactum minus a point be totally disconnected?

asked Feb 27, 2010 at 2:38

24 votes

4 answers

2k views

Free splittings of one-relator groups

asked Jun 1, 2010 at 0:27

24 votes

1 answer

869 views

The congruence subgroup property for mapping class groups and a conjecture of Grothendieck

asked Sep 18 at 18:50

21 votes

4 answers

2k views

Is there a non-Hopfian lacunary hyperbolic group?

asked Sep 18, 2011 at 20:07

19 votes

0 answers

575 views

The oriented homeomorphism problem for Haken 3-manifolds

asked Sep 19, 2012 at 14:37

15 votes

1 answer

776 views

An infinite, amenable, finitely presentable group with no non-trivial finite quotients

asked Jan 29, 2014 at 13:34

15 votes

2 answers

870 views

A space of ideals

asked Mar 26, 2012 at 13:46

11 votes

4 answers

1k views

Examples of acylindrical 3-manifolds

asked Jun 5, 2012 at 2:05

11 votes

1 answer

619 views

Analogues of the curve complex for Out(F)

asked Sep 20, 2013 at 11:39

9 votes

1 answer

285 views

Factoring maps of handlebodies

asked Nov 18, 2009 at 20:07

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10 Questions

Can a connected planar compactum minus a point be totally disconnected?

Free splittings of one-relator groups

The congruence subgroup property for mapping class groups and a conjecture of Grothendieck

Is there a non-Hopfian lacunary hyperbolic group?

The oriented homeomorphism problem for Haken 3-manifolds

An infinite, amenable, finitely presentable group with no non-trivial finite quotients

A space of ideals

Examples of acylindrical 3-manifolds

Analogues of the curve complex for Out(F)

Factoring maps of handlebodies