
theorem Th5:
  NORMSTR (# the_set_of_l1RealSequences, Zero_(
    the_set_of_l1RealSequences,Linear_Space_of_RealSequences), Add_(
    the_set_of_l1RealSequences,Linear_Space_of_RealSequences), Mult_(
    the_set_of_l1RealSequences,Linear_Space_of_RealSequences), l_norm #) is
  RealLinearSpace by Lm2,RSSPACE:15;
