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 V be RealLinearSpace,
    F be set
   holds
    F is Function of V,REAL
      iff
    F is Function of RLSp2RVSp(V),REAL;
