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NORMAL AUTOMORPHISMS OF A FREE METABELIAN NILPOTENT GROUP
Published online by Cambridge University Press: 04 December 2009
Abstract
An automorphism φ of a group G is said to be normal if φ(H) = H for each normal subgroup H of G. These automorphisms form a group containing the group of inner automorphisms. When G is a non-abelian free (or free soluble) group, it is known that these groups of automorphisms coincide, but this is not always true when G is a free metabelian nilpotent group. The aim of this paper is to determine the group of normal automorphisms in this last case.
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- Copyright © Glasgow Mathematical Journal Trust 2009
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