Subnormal-to-normal subgroup
This article defines a subgroup property: a property that can be evaluated to true/false given a group and a subgroup thereof, invariant under subgroup equivalence. View a complete list of subgroup properties[SHOW MORE]
BEWARE! This term is nonstandard and is being used locally within the wiki. [SHOW MORE]
Definition
Symbol-free definition
A subgroup of a group is termed subnormal-to-normal if it is either normal in the whole group, or not subnormal in the whole group.
Every subgroup is subnormal-to-normal iff the group is a T-group.