Devirli yükselen ve ?-yükselen modüller
Özet
This thesis consists of five chapters.The first chapter is devoted to the introduction.In the second chapter, main definitions and properties which are necessary for later use are given.In the third chapter, the definition of a lifting module is given and some properties of lifting modules are studied.In the fourth chapter, general properties of principally lifting modules are investigated.In the fifth chapter, some characterizations of ?-semiperfect and ?-perfect rings are given in terms?-lifting and ?-supplemented modules.