Left residual of 2-subnormal by normal is normal of characteristic
This article gives a proof/explanation of the equivalence of multiple definitions for the term normal subgroup of characteristic subgroup
View a complete list of pages giving proofs of equivalence of definitions
- is a Normal subgroup of characteristic subgroup (?) of : in other words, there is a characteristic subgroup of such that is a normal subgroup of .
- Whenever is a Normal subgroup (?) of some group , is a 2-subnormal subgroup (?) of .