# group structure?

• August 3rd 2008, 05:29 AM
mathemanyak
group structure?
show that AUT(G)={Q: Q: G-> G is isomorph} has group structure under operation morphism
• August 3rd 2008, 09:08 AM
JaneBennet
Hint: The identity mapping on G is an automorphism, and if $\phi,\psi$ are automorphisms, so are $\phi\circ\psi$ and $\phi^{-1}$.