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 Th96:
  m <= n implies A? |^ (m, n) = A? |^ (0, n)
proof
  assume
A1: m <= n;
  <%>E in A? by Th78;
  hence thesis by A1,Th72;
end;
