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 Th94:
  (A?) |^ k = (A?) |^ (0, k)
proof
  <%>E in A? by Th78;
  hence thesis by Th34;
end;
