Structure
The Schreier conjecture asserts that Out(G) is always a solvable group when G is a finite simple group. This result is now known to be true as a corollary of the classification of finite simple groups, although no simpler proof is known.
Read more about this topic: Outer Automorphism Group
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—Henry Wadsworth Longfellow (1809–1882)
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—Guillaume Apollinaire (1880–1918)
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