
theorem
for F being finite Field
for a being Element of F holds (Frob F).a = a iff a in PrimeField F
proof
let F be finite Field, a be Element of F;
consider p being Prime, n being non zero Nat such that
A: Char F = p & order F = p|^n by finex2;
thus thesis by A,Ffix2;
end;
