reserve E, x, y, X for set;
reserve A, B, C for Subset of E^omega;
reserve a, b for Element of E^omega;
reserve i, k, l, kl, m, n, mn for Nat;

theorem
  A c= B* implies B* = (B \/ (A |^ (m, n)))* by Th64,FLANG_1:67;
