scholarly journals SS-Injective Modules and Rings

Author(s):  
Akeel Ramadan Mehdi ◽  
Adel Salim Tayyah

     We introduce and investigate SS-injectivity as a generalization of both soc-injectivity and small injectivity. A right module  over a ring  is said to be SS- -injective (where  is a right -module) if every -homomorphism from a semisimple small submodule of  into  extends to . A module  is said to be SS-injective (resp. strongly SS-injective), if  is SS- -injective (resp. SS- -injective for every right -module ). Some characterizations and properties of (strongly) SS-injective modules and rings are given. Some results on soc-injectivity are extended to SS-injectivity.

2011 ◽  
Vol 84 (2) ◽  
pp. 408-432 ◽  
Author(s):  
Ioannis Emmanouil ◽  
Olympia Talelli
Keyword(s):  

2012 ◽  
Vol 40 (10) ◽  
pp. 3841-3858 ◽  
Author(s):  
Zenghui Gao
Keyword(s):  

2015 ◽  
Vol 144 (3) ◽  
pp. 1015-1020 ◽  
Author(s):  
Lars Winther Christensen ◽  
Fatih Köksal

1975 ◽  
Vol s2-11 (3) ◽  
pp. 267-275 ◽  
Author(s):  
Rodney Y. Sharp
Keyword(s):  

1992 ◽  
Vol 57 (2) ◽  
pp. 724-740 ◽  
Author(s):  
T. G. Kucera ◽  
M. Prest

In [H1] Hrushovski introduced a number of ideas concerning the relations between types which have proved to be of importance in stability theory. These relations allow the geometries associated to various types to be connected. In this paper we consider the meaning of these concepts in modules (and more generally in abelian structures). In particular, we provide algebraic characterisations of notions such as hereditary orthogonality, “p -internal” and “p-simple”. These characterisations are in the same spirit as the algebraic characterisations of such concepts as orthogonality and regularity, that have already proved so useful. Of the concepts that we consider, p-simplicity is dealt with in [H3] and the other three concepts in [H2].The descriptions arose out of our desire to develop some intuition for these ideas. We think that our characterisations may well be useful in the same way to others, particularly since our examples are algebraically uncomplicated and so understanding them does not require expertise in the model theory of modules. Furthermore, in view of the increasing importance of these notions, the results themselves are likely to be directly useful in the model-theoretic study of modules and, via abelian structures, in more general stability-theoretic contexts. Finally, some of our characterisations suggest that these ideas may be relevant to the algebraic problem of understanding the structure of indecomposable injective modules.


1981 ◽  
Vol 9 (9) ◽  
pp. 989-999 ◽  
Author(s):  
P.F. Smith

2010 ◽  
Vol 52 (A) ◽  
pp. 53-59 ◽  
Author(s):  
PAULA A. A. B. CARVALHO ◽  
CHRISTIAN LOMP ◽  
DILEK PUSAT-YILMAZ

AbstractThe purpose of this paper is to study finiteness conditions on injective hulls of simple modules over Noetherian down-up algebras. We will show that the Noetherian down-up algebras A(α, β, γ) which are fully bounded are precisely those which are module-finite over a central subalgebra. We show that injective hulls of simple A(α, β, γ)-modules are locally Artinian provided the roots of X2 − αX − β are distinct roots of unity or both equal to 1.


Author(s):  
Avanish Kumar Chaturvedi ◽  
Sandeep Kumar

For any two right [Formula: see text]-modules [Formula: see text] and [Formula: see text], [Formula: see text] is said to be a ps-[Formula: see text]-injective module if, any monomorphism [Formula: see text] can be extended to [Formula: see text]. Also, [Formula: see text] is called psq-injective if [Formula: see text] is a ps-[Formula: see text]-injective module. We discuss some properties and characterizations in terms of psq-injective modules.


1993 ◽  
Vol s3-67 (1) ◽  
pp. 127-158 ◽  
Author(s):  
C. J. B. Brookes ◽  
K. A. Brown

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