T-continuous modules

被引:7
作者
Asgari, Sh. [1 ,2 ]
机构
[1] Isfahan Univ Technol, Dept Math Sci, POB 84156-83111, Esfahan, Iran
[2] Inst Res Fundamental Sci IPM, Sch Math, Tehran, Iran
关键词
Continuous modules; nonsingular and Z(2)-torsion modules; t-continuous modules; t-extending modules; ENDOMORPHISM-RINGS; EXTENDING MODULES;
D O I
10.1080/00927872.2016.1226868
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
We introduce and investigate t-continuous modules. A module M is called t-continuous if M is t-extending, and every submodule of M which contains Z(2)(M) and is isomorphic to a direct summand of M, is itself a direct summand. The t-continuous property is inherited by direct summands. It is shown that M is a t-continuous module, if and only if, M is t-extending and the endomorphism ring of M/Z(2)(M) is von Neumann regular, if and only if, M = Z(2)(M) circle plus M', where M' is a continuous module. The rings R for which every (finitely generated, cyclic, free) R-module is t-continuous are characterized. It is proved that every t-continuous R-module is continuous exactly when R is a right SI-ring. Moreover, it is shown that the notions of a right GV-ring and a right V-ring coincide for right t-continuous rings.
引用
收藏
页码:1941 / 1952
页数:12
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