| dc.contributor.author | Naghipoor, M. A. | en_US |
| dc.contributor.author | Ershad, M. | en_US |
| dc.date.accessioned | 1399-07-08T17:44:46Z | fa_IR |
| dc.date.accessioned | 2020-09-29T17:44:46Z | |
| dc.date.available | 1399-07-08T17:44:46Z | fa_IR |
| dc.date.available | 2020-09-29T17:44:46Z | |
| dc.date.issued | 2014-05-01 | en_US |
| dc.date.issued | 1393-02-11 | fa_IR |
| dc.date.submitted | 2013-03-06 | en_US |
| dc.date.submitted | 1391-12-16 | fa_IR |
| dc.identifier.citation | Naghipoor, M. A., Ershad, M.. (2014). On Covers of Acts over Semigroups. Iranian Journal of Science and Technology (Sciences), 38(2), 117-121. doi: 10.22099/ijsts.2014.1992 | en_US |
| dc.identifier.issn | 1028-6276 | |
| dc.identifier.uri | https://dx.doi.org/10.22099/ijsts.2014.1992 | |
| dc.identifier.uri | http://ijsts.shirazu.ac.ir/article_1992.html | |
| dc.identifier.uri | https://iranjournals.nlai.ir/handle/123456789/28263 | |
| dc.description.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. | en_US |
| dc.format.extent | 122 | |
| dc.format.mimetype | application/pdf | |
| dc.language | English | |
| dc.language.iso | en_US | |
| dc.publisher | Springer | en_US |
| dc.relation.ispartof | Iranian Journal of Science and Technology (Sciences) | en_US |
| dc.relation.isversionof | https://dx.doi.org/10.22099/ijsts.2014.1992 | |
| dc.subject | Precover of act | en_US |
| dc.subject | cover of act | en_US |
| dc.subject | torsion free act | en_US |
| dc.title | On Covers of Acts over Semigroups | en_US |
| dc.type | Text | en_US |
| dc.type | Regular Paper | en_US |
| dc.contributor.department | Department of Mathematics, College of Sciences, Shiraz University, P. O. Box 71454, Shiraz, Iran | en_US |
| dc.contributor.department | Department of Mathematics, College of Sciences, Shiraz University, P. O. Box 71454, Shiraz, Iran | en_US |
| dc.citation.volume | 38 | |
| dc.citation.issue | 2 | |
| dc.citation.spage | 117 | |
| dc.citation.epage | 121 | |
