Holomorph of Z8: Difference between revisions

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The group is solvable. In fact, it is [[metabelian group|metabelian]], because the additive group is an Abelian [[normal subgroup]] (isomorphic to <math>\Z/8\Z</math>) and the quotient is Abelian, isomorphic to the [[Klein-four group]].
The group is solvable. In fact, it is [[metabelian group|metabelian]], because the additive group is an Abelian [[normal subgroup]] (isomorphic to <math>\Z/8\Z</math>) and the quotient is Abelian, isomorphic to the [[Klein four-group]].


The commutator subgroup of <math>G</math> is not the whole of the additive group, though. It is only the even integers in the additive group.
The commutator subgroup of <math>G</math> is not the whole of the additive group, though. It is only the even integers in the additive group.

Revision as of 19:53, 27 March 2009

This article is about a particular group, i.e., a group unique upto isomorphism. View specific information (such as linear representation theory, subgroup structure) about this group
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This particular group is a finite group of order: 32

Definition

This group (which we shall call G throughout) can be defined in either of these ways:

  • It is the holomorph of the cyclic group on eight elements. In other words, it is the direct product of the cyclic group on eight elements, with its automorphism group.
  • It is the holomorph of the ring Z/8Z.

Group properties

Solvability

This particular group is solvable

The group is solvable. In fact, it is metabelian, because the additive group is an Abelian normal subgroup (isomorphic to Z/8Z) and the quotient is Abelian, isomorphic to the Klein four-group.

The commutator subgroup of G is not the whole of the additive group, though. It is only the even integers in the additive group.

Endomorphisms

Subgroups