theorem
  for X, Y be RealLinearSpace holds RLSStruct (# LinearOperators(X,Y),
    Zero_(LinearOperators(X,Y),RealVectSpace(the carrier of X,Y)), Add_(
LinearOperators(X,Y), RealVectSpace(the carrier of X,Y)), Mult_(LinearOperators
(X,Y), RealVectSpace(the carrier of X,Y)) #) is Subspace of RealVectSpace(the
  carrier of X,Y) by Th14,RSSPACE:11;
