Characteristic subgroup of direct factor

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This page describes a subgroup property obtained as a composition of two fundamental subgroup properties: characteristic subgroup and direct factor
View other such compositions|View all subgroup properties

Definition

Symbol-free definition

A subgroup of a group is said to be a characteristic subgroup of direct factor if it occurs as a characteristic subgroup of a direct factor of the whole group.

Definition with symbols

A subgroup $H$ of a group $G$ is said to be a characteristic subgroup of direct factor if there are subgroups $K,L$ such that $H$ is characteristic in $K$, and $K\times L=G$.

Relation with other properties

Stronger properties

• Characteristic subgroup
• Direct factor

Weaker properties

• Normal subgroup