throughout this dissertation r is a commutative ring with identity and m is a unitary r-module. in this dissertation we investigate submodules of multiplication , prufer and dedekind modules. we also stat the equivalent conditions for which is ring , wher l is a submodule of afaithful multiplication prufer module. we introduce the concept of integrally closed modules and show that faithful mu...

Background : The most important event in the doctoral course is the completion and defense of the dissertation, which leads to learning and improving the necessary skills to conduct research and improve performance in the field. Evaluating a doctoral dissertation defense program helps to identify the strengths and weaknesses of this process. Therefore, this comparative study has investigated th...