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Math Help - group structure?

  1. #1
    Junior Member mathemanyak's Avatar
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    group structure?

    show that AUT(G)={Q: Q: G-> G is isomorph} has group structure under operation morphism
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  2. #2
    Senior Member JaneBennet's Avatar
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    Hint: The identity mapping on G is an automorphism, and if \phi,\psi are automorphisms, so are \phi\circ\psi and \phi^{-1}.
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