C─余模和有理C~＊─模

C-Comodules and Rational C￣*-Modules Ren Beishang

众所周知，余模和有理模在Ｈｏｐｆ代数理论的研究中发挥着重要的作用。本文将给出余模与有理模之间的关系，论证在特殊条件下Ｍ＊的最大有理Ｃ＊─子模的刻划问题。

It is well known that comodules and rational modules can not only become basic theory but also play an important role in studying Hopf algebra theory. In this paper we’ll give the relationship between comodules and rational modules. and show that the characterization of maximal rational C*-submodule of M* under a special condition.