THE PROPER CLASS GENERATED BY WEAK SUPPLEMENTS


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Alizade R. , Demirci Y. M. , Durgun Y., Pusat D.

COMMUNICATIONS IN ALGEBRA, cilt.42, ss.56-72, 2014 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 42 Konu: 1
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1080/00927872.2012.699567
  • Dergi Adı: COMMUNICATIONS IN ALGEBRA
  • Sayfa Sayıları: ss.56-72

Özet

We show that, for hereditary rings, the smallest proper classes containing respectively the classes of short exact sequences determined by small submodules, submodules that have supplements and weak supplement submodules coincide. Moreover, we show that this class can be obtained as a natural extension of the class determined by small submodules. We also study injective, projective, coinjective and coprojective objects of this class. We prove that it is coinjectively generated and its global dimension is at most 1. Finally, we describe this class for Dedekind domains in terms of supplement submodules.