الفهرس 
PRELIMINARIES AND AUXILIARY TOOLSOnly 14 pages are availabe for public view
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Abstract
The main aim of this thesis is to study the properties of the classes right N-semilocal rings, which generalize the class of semilocal rings as well as other related rings that include right N- local, right N- perfect, right N- semiperfect and right N- semiprimary.
We will continue the studying of the transfer of some algebraic properties between the right strongly Hopfian ring and some ring extensions such as the direct product, the amalgamated duplication, and the skew generalized power series ring. Moreover, we explore the new classes of rings that generalized versions of the right N-semilocal and we examine how these characteristics are transferred from a ring R to some of its extensions.