e/Fully characteristic subgroup

Information
has gloss	eng: In mathematics, a subgroup of a group is fully characteristic (or fully invariant) if it is invariant under every endomorphism of the group. That is, any endomorphism of the group takes elements of the subgroup to elements of the subgroup.
lexicalization	eng: fully characteristic subgroup
lexicalization	eng: Fully-characteristic subgroup
instance of	c/Subgroup properties