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 Th34:
  (for n holds scf(r).n = 0) implies r = 0
proof
  assume for n holds scf(r).n = 0;
  then rfs(r).0 = 0 by Th33;
  hence thesis by Def3;
end;
