reserve X for set,
        n,m,k for Nat,
        K for Field,
        f for n-element real-valued FinSequence,
        M for Matrix of n,m,F_Real;

theorem
  for F be set
  holds
  F is FinSequence of TOP-REAL n
    iff
  F is FinSequence of REAL-NS n by Th4;
