reserve a, b, k, n, m for Nat,
  i for Integer,
  r for Real,
  p for Rational,
  c for Complex,
  x for object,
  f for Function;

theorem
  i > 1 implies scf(1/i).0 = 0 & scf(1/i).1 = i & scf(1/i).(n+2) = 0 by Lm5;
