Comment on ``Statistics of the Lyapunov Exponent in 1D random   periodic-on-Average Systems" [Phys. Rev. Lett. {\bf 81}, 5390, 1998]
  In this paper we comment the results of ``Statistics of the Lyapunov Exponent in 1D random periodic-on-Average Systems" [Phys. Rev. Lett. {\bf 81}, 5390, 1998]. 
Pi-Gang Luan and Zhen Ye