reserve i,j,k,n,m,l,s,t for Nat;
reserve a,b for Real;
reserve F for real-valued FinSequence;
reserve z for Complex;
reserve x,y for Complex;
reserve r,s,t for natural Number;

theorem
  (x|^s) |^ t = x|^(s*t)
proof
  reconsider x as Element of COMPLEX by XCMPLX_0:def 2;
  x|^(s*t) = Product(t |-> x|^s) by RVSUM_1:112;
  hence thesis;
end;
