Recall that H is a characteristic subgroup of K if (H) = H
Chapter 11, Problem 41SE(choose chapter or problem)
Recall that H is a characteristic subgroup of K if \(\phi(H)=H\) for every automorphism \(\phi\) of K. Prove that if H is a characteristic subgroup of K, and K is a normal subgroup of G, then H is a normal subgroup of G.
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