Direct factor-preserving automorphism

Symbol-free definition
An automorphism of a group is said to be direct factor-preserving if it takes each direct factor to itself, that is, if every direct factor is invariant under the automorphism.

Stronger properties

 * Weaker than::Monomial automorphism
 * Weaker than::Inner automorphism
 * Weaker than::Power automorphism
 * Weaker than::Normal automorphism