"Intermediate notions between [[left-transitively 2-subnormal subgroup]] and [[characteristic subgroup]]","Intermediate notions between [[left-transitively 2-subnormal subgroup]] and [[characteristic subgroup]]#"
"Cofactorial automorphism-invariant subgroup","Cofactorial automorphism-invariant subgroup"
"Sub-cofactorial automorphism-invariant subgroup","Sub-cofactorial automorphism-invariant subgroup"
"Subgroup-cofactorial automorphism-invariant subgroup","Subgroup-cofactorial automorphism-invariant subgroup"