2-hypernormalized subgroup

Symbol-free definition
A subgroup of a group is termed 2-hypernormalized if its normalizer is a normal subgroup.

Stronger properties

 * Weaker than::Normal subgroup

Weaker properties

 * Stronger than::Finitarily hypernormalized subgroup
 * Stronger than::Intermediately finitarily hypernormalized subgroup
 * Stronger than::Hypernormalized subgroup
 * Stronger than::2-subnormal subgroup: Also related:
 * Stronger than::Subnormal subgroup
 * Stronger than::Conjugate-permutable subgroup