A GENERALIZATION OF circle plus-COFINITELY SUPPLEMENTED MODULES


Kosar B., Turkmen B. N.

BULLETIN OF THE IRANIAN MATHEMATICAL SOCIETY, cilt.42, sa.1, ss.91-99, 2016 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 42 Sayı: 1
  • Basım Tarihi: 2016
  • Dergi Adı: BULLETIN OF THE IRANIAN MATHEMATICAL SOCIETY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED)
  • Sayfa Sayıları: ss.91-99
  • Anahtar Kelimeler: Supplements, cofinite submodule, (circle plus-)cofinitely supplemented module, RINGS
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

We say that a module M is a cms-module if, for every cofinite submodule N of M, there exist submodules K and K' of M such that K is a supplement of N, and K, K' are mutual supplements in M. In this article, the various properties of cms-modules are given as a generalization of circle plus-cofinitely supplemented modules. In particular, we prove that a pi-projective module M is a cms-module if and only if M is circle divide-cofinitely supplemented. Finally, we show that every free R-module is a cms-module if and only if R is semiperfect.