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Finite groups with large centralizers

Published online by Cambridge University Press:  17 April 2009

Edward A. Bertram  and
Marcel Herzog
Edward A. Bertram
Affiliation:
Department of MathematicsUniversity of Hawaii-ManoaHonolulu, Hawaii. 96822.
Marcel Herzog
Affiliation:
School of Mathematics Tel-Aviv UniversityRamat-Aviv, 69978 Tel-Aviv. Israel.
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Abstract

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It is known that a finite non-abelian group G has a proper centralizer of order if, for example, |G| is even and |Z(G)| is odd, or whenever G is solvable. Often the exponent can be improved to , for example when G is supersolvable, or metabelian, or |G = pαqβ. Here we show more generally that this improvement is possible in many situations where G is factorizable into the product of two subgroups. In particular, much more evidence is presented to support the conjecture that some proper centralizer has order whenever G is a finite non-abelian solvable group.

Information

Type
Research Article
Information
Bulletin of the Australian Mathematical Society , Volume 32 , Issue 3 , December 1985 , pp. 399 - 414
Copyright
Copyright © Australian Mathematical Society 1985

References

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