MathOverflow
HJRW's user avatar
HJRW's user avatar
HJRW's user avatar
HJRW
  • Member for 13 years, 11 months
  • Last seen this week
Profile Activity
Stats
23,510
reputation
650k
reached
285
answers
9
questions
Communities
Badges
View all badges
2
gold badges
65
silver badges
139
bronze badges
Top tags
View all tags
1,460
Score
215
Posts
73
Posts %
560
Score
83
Posts
28
Posts %
548
Score
77
Posts
26
Posts %
278
Score
35
Posts
12
Posts %
167
Score
23
Posts
8
Posts %
151
Score
22
Posts
7
Posts %
Top posts
View all questions and answers
All Questions Answers
Score Newest
answer
46
Most interesting mathematics mistake?
Dec 15, 2009
answer
43
What are some of the big open problems in 3-manifold theory?
Aug 22, 2010
answer
39
finite generated group realized as fundamental group of manifolds
Feb 16, 2010
answer
35
What are your favorite instructional counterexamples?
Mar 2, 2010
question
33
Can a connected planar compactum minus a point be totally disconnected?
Feb 27, 2010
answer
28
Can a group be a universal Turing machine?
Feb 14, 2012
answer
27
Mapping from a finite index subgroup onto the whole group
Mar 2, 2012
answer
26
Does injectivity of $\pi_1(\partial U) \to \pi_1(M)$ imply injectivity of $\pi_1(U) \to \pi_1(M)$?
Oct 18, 2019
answer
25
Primes occurring as orders of elements of a finitely presented group
Feb 8, 2013
question
24
Free splittings of one-relator groups
Jun 1, 2010
Top network posts
View all network posts
69
$|G|>2$ implies $G$ has non trivial automorphism
39
subgroups of finitely generated groups with a finite index
29
Finding subgroups of a free group with a specific index
15
A space of ideals
9
Epimorphism from GL(2,Z) to GL(2,Z)

Your privacy

By clicking “Accept all cookies”, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy.