
تعداد نشریات | 162 |
تعداد شمارهها | 6,693 |
تعداد مقالات | 72,240 |
تعداد مشاهده مقاله | 129,239,021 |
تعداد دریافت فایل اصل مقاله | 102,075,113 |
Essentially Retractable Modules | ||
Journal of Sciences, Islamic Republic of Iran | ||
مقاله 8، دوره 18، شماره 4، اسفند 2007، صفحه 355-360 اصل مقاله (99.26 K) | ||
نوع مقاله: Original Paper | ||
نویسنده | ||
M.R. Vedadi* | ||
Department of Mathematical Sciences, Isfahan University of Technology, Isfahan 84156-83111, Islamic Republic of Iran | ||
چکیده | ||
We call a module essentially retractable if HomR for all essential submodules N of M. For a right FBN ring R, it is shown that: (i) A non-zero module is retractable (in the sense that HomR for all non-zero ) if and only if certain factor modules of M are essentially retractable nonsingular modules over R modulo their annihilators. (ii) A non-zero module is essentially retractable if and only if there exists a prime ideal such that HomR. Over semiprime right nonsingular rings, a nonsingular essentially retractable module is precisely a module with non-zero dual. Moreover, over certain rings R, including right FBN rings, it is shown that a nonsingular module M with enough uniforms is essentially retractable if and only if there exist uniform retractable R-modules and R-homomorphisms with . | ||
کلیدواژهها | ||
Dual module؛ Essentially retractable؛ Homo-related | ||
آمار تعداد مشاهده مقاله: 1,895 تعداد دریافت فایل اصل مقاله: 2,239 |