Geoff Robinson

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Name	Geoff Robinson
Member for	2 years
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Location	University of Aberdeen
Age	59

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Character free proof that Frobenius kernel is a normal subgroup? (2)

Determinant of sum of positive definite matrices

Failure of a basic fact from Representation Theory

Subgroups of GL(2,q)

Groups that do not exist

Number of 2-dimensional irreducible representations of a finite group ?

How to decide this function takes integer values?

Groups with triple system of self-normalizing subgroups

solvable groups

Characterization of the transfer map in group theory

Reference request for projective representations of finite groups over a non-problematic field

Is 2-sylow subgroup of a rational group also a rational group?

Which groups are quotients of symmetric groups?

Finite groups such that every irrep can be induced from trivial irrep of a subgroup ?

Bound on the size of a group given a faithful irrep of a certain dimension

Congruence subgroups as abstract groups

Finite groups having no dihedral subgroup of order $2p$ for any odd prime $p$

Groups of order $n$ with a character whose degree is at least $0.8\sqrt{n}$ (say)

Is there formula name and proof for this theorem ?

The Odds 3 (or More) Group Elements Commute

Structure of F_p[G], for finite group G ?

Bijection between irreducible representations and conjugacy classes of finite groups

Automorphism group

Frobenius formula for the determinant

Subgroups of $GL(k,q)$ for bounded $k$

Number of generators of a subgroup of a finite simple group

Eigenvalues of nonnegative integer matrices

multiplicative order of 2 mod p

Kernel of modular representation of a finite group

Conjugacy for $p$-adic matrices of finite order

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