reserve E, x, y, X for set;
reserve A, B, C, D for Subset of E^omega;
reserve a, a1, a2, b, c, c1, c2, d, ab, bc for Element of E^omega;
reserve e for Element of E;
reserve i, j, k, l, n, n1, n2, m for Nat;

theorem Th48:
  <%>E in A*
proof
  {<%>E} = A |^ 0 by Th24;
  then <%>E in A |^ 0 by TARSKI:def 1;
  hence thesis by Th41;
end;
