Products of conjugacy classes and fixed point spaces

Details Products of conjugacy classes and fixed point spaces Products of conjugacy classes and fixed point spaces

2010-05-20

arxiv.org/abs/1005.3756v3

Mathematics

Group Theory

44 pages

Scientific paper

We prove several results on products of conjugacy classes in finite simple groups. The first result is that there always exists a uniform generating triple. This result and other ideas are used to solve a 1966 conjecture of Peter Neumann about the existence of elements in an irreducible linear group with small fixed space. We also show that there always exist two conjugacy classes in a finite non-abelian simple group whose product contains every nontrivial element of the group. We use this to show that every element in a non-abelian finite simple group can be written as a product of two rth powers for any prime power r (in particular, a product of two squares).

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