- #1
arthurhenry
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Wikipedia states:
when G splits as direct sum of H and K, then
Aut(H \oplus K) \cong Aut(H) \oplus Aut(K)
Could someone please help me prove this or perhaps give a reference.
Thank you
when G splits as direct sum of H and K, then
Aut(H \oplus K) \cong Aut(H) \oplus Aut(K)
Could someone please help me prove this or perhaps give a reference.
Thank you