
theorem CF:
  for n be non zero Nat, c be Complex, f be FinSequence holds
    (<*c*>^f).(n + 1) = f.n
  proof
    let n be non zero Nat, c be Complex, f be FinSequence;
    reconsider g = <*c*> as 1-element FinSequence;
    len g = 1 by FINSEQ_1:40;
    hence thesis by FINSEQ165;
  end;
