MathOverflow will be down for maintenance for approximately 3 hours, starting Monday evening (06/24/2013) at approximately 9:00 PM Eastern time (UTC-4).

Geoff Robinson

10,376
Reputation
3763 views
Is this your account?

Registered User 

Name Geoff Robinson
Member for 2 years
Seen 2 hours ago
Website
Location University of Aberdeen
Age 59
0

Questions

 

173

Answers
votes newest views recent
20
Character free proof that Frobenius kernel is a normal subgroup? (2)
20
Determinant of sum of positive definite matrices
20
Failure of a basic fact from Representation Theory
19
Subgroups of GL(2,q)
16
Groups that do not exist
15
Number of 2-dimensional irreducible representations of a finite group ?
15
How to decide this function takes integer values?
15
Groups with triple system of self-normalizing subgroups
15
How much of character theory can be done without Schur’s lemma or the Artin-Wedderburn theorem?
14
solvable groups
13
Characterization of the transfer map in group theory
13
Reference request for projective representations of finite groups over a non-problematic field
12
Is 2-sylow subgroup of a rational group also a rational group?
12
Which groups are quotients of symmetric groups?
11
Finite groups such that every irrep can be induced from trivial irrep of a subgroup ?
11
Bound on the size of a group given a faithful irrep of a certain dimension
11
Congruence subgroups as abstract groups
11
Finite groups having no dihedral subgroup of order $2p$ for any odd prime $p$
11
The equation x^2+2=y^3 admits a unique solution in positive integer
10
Groups of order $n$ with a character whose degree is at least $0.8\sqrt{n}$ (say)
10
Is there formula name and proof for this theorem ?
10
The Odds 3 (or More) Group Elements Commute
10
Structure of F_p[G], for finite group G ?
9
Bijection between irreducible representations and conjugacy classes of finite groups
9
Automorphism group
9
Frobenius formula for the determinant
9
Subgroups of $GL(k,q)$ for bounded $k$
9
Number of generators of a subgroup of a finite simple group
9
Eigenvalues of nonnegative integer matrices
9
multiplicative order of 2 mod p
1 2 3 4 5 6 next

 

63

Votes
61
2

 

87

Tags
× 104
× 61
× 55
× 24
× 14
× 9
× 6
× 6
× 6
× 4
 × 4
× 4
× 4
× 4
× 3
× 3
× 3
× 3
× 3
× 3
 × 2
× 2
× 2
× 2
× 2
× 2
× 2
× 2
× 2
× 2
 × 2
× 2









 

52

Badges
● Enlightened× 11
● Nice Answer× 23
● Yearling× 2
 ● Necromancer× 7
● Fanatic
● gr.group-theory
 ● Critic
● Supporter
● Cleanup
 ● Enthusiast
● Commentator
● Editor
 ● Teacher