reserve i,j,n,n1,n2,m,k,l,u for Nat,
        r,r1,r2 for Real,
        x,y for Integer,
        a,b for non trivial Nat,
        F for XFinSequence,
        cF,cF1,cF2 for complex-valued XFinSequence,
        c,c1,c2 for Complex;

theorem Th5:
  Product <%c%> = c
proof
  c in COMPLEX by XCMPLX_0:def 2;
  hence thesis by AFINSQ_2:37;
end;
