- #1
johnnyboy2005
- 29
- 0
hey, was just hoping i could get a little help getting started on this one...
Let r be an element in U(n). Prove that the mapping (alpha):Zn-->Zn defined by (alpha)(s) = sr mod n for all s in Zn is an automorphism of Zn.
not expecting the answer, maybe to just push me in the right direction...thanks so much
Let r be an element in U(n). Prove that the mapping (alpha):Zn-->Zn defined by (alpha)(s) = sr mod n for all s in Zn is an automorphism of Zn.
not expecting the answer, maybe to just push me in the right direction...thanks so much