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Automorphisms of principal blocks stabilizing Sylow subgroups
Authors:Email author" target="_blank">M?HertweckEmail author
Institution:(1) Institut für Geometrie und Topologie, Lehrstuhl für Differentialgeometrie, Universität Stuttgart, Fachbereich Mathematik, Pfaffenwaldring 57, 70569 Stuttgart, Germany
Abstract:Let p be a prime, G a finite group which has a normal p-subgroup containing its own centralizer in G, and R a commutative local ring with residue class field of characteristic p. In this paper, it is shown that if 
$ \alpha $
is an augmented automorphism of RG which fixes a Sylow p-subgroup P of G, there is 
$ \rho \in \textrm{Aut}(G) $
such that 
$ x\alpha\rho = x $
for all 
$ x \in P, $
and 
$ \alpha \rho $
is an inner automorphism of RG. Received: 26 July 2000
Keywords:Primary 20C05  Secondary 16U60  
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