find all automorphisms on z6
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Answer:
z-0,1,2,3,4,5
observe-AKEZ6,K6 - e-0mod6
recal:suppose 0 is an isomorphism from a group g to g .then A a E G a 0/- a
recal- Aut (Zn)- U (n)
so,Aut (z6) - U(6)-(1,5)
thus,we deduce the possible candidates be ( 1) a- 1 or (1) a-5
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