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Paper Information

Journal:   IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION A- SCIENCE   2014 , Volume 38 , Number A2; Page(s) 117 To 121.
 
Paper: 

ON COVERS OF ACTS OVER SEMIGROUPS

 
 
Author(s):  NAGHIPOOR M.A.*, ERSHAD M.
 
* DEPARTMENT OF MATHEMATICS, COLLEGE OF SCIENCES, SHIRAZ UNIVERSITY, SHIRAZ, IRAN
 
Abstract: 

Let S be a monoid and X a class of S-acts which is closed under coproducts. The object of this article is to find conditions under which all S-acts have X-precovering. We have shown that the existence of torsion-free precovering implies the existence of torsion-free covering. This work is an attempt to further facilitate the study of the conjecture that all S-acts have flat cover.

 
Keyword(s): PRECOVER OF ACT, COVER OF ACT, TORSION FREE ACT
 
References: 
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