الفهرس | Only 14 pages are availabe for public view |
Abstract One of the most interesting areas of research in abstract algebra is the theory of filtered and graded rings and modules. This theory, historically appeared since 1950. In the past decade a substantial body of literature on thr theory of filtered and graded rings and modules has developed, (see, C. Nastasescu, and F. Van Oystaeyen[12,13,17], G. M. Bergman[2], M. A. Scheunert[15] and others). |