Ru and HS are in E7(5)


P.M.B. Kleidman
30 West 10th Street
New York, NY 10011

U. Meierfrankenfeld
Department of Mathematics
Michigan State University
E. Lansing, MI 48824-1027

A.J.E. Ryba
Marquette University
Milwaukee, WI 53233

August 1995



Abstract:

It is shown that both of the finite simple groups Ru and HS arecontained in the exceptionell Lie group E7(5). This settles two of thefew remaining questions about the embedding of sporadic groups inexceptionell groups of Lie type. For both groups two proofs are given,one which uses a computer and one which does not.


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Last Revised 8/22/96