%0 Journal Article %T 序S-系的弱拉回平坦性及同调分类<br>Weakly pullback flatness of S-posets and the homological classification %A 赵梅梅 %J 山东大学学报(理学版) %D 2015 %R 10.6040/j.issn.1671-9352.0.2014.244 %X 摘要: 设S是序幺半群, 在S上定义了满足条件(E')的序S-系, 引入了序S-系的弱拉回平坦性, 并研究了右Rees商序S-系对于序幺半群的同调分类问题。<br>Abstract: LetS be a pomonoid. S-poset satisfying condition (E') is defined and weakly pullback flatness is given over pomonoid. Furthermore, the homological classifications of pomonoids by their Rees factor S-posets are investigated %K 条件(E') %K 弱拉回平坦 %K Rees商序< %K em> %K S< %K /em> %K -系 %K < %K br> %K condition(E') %K weakly pullback flat %K Rees factor < %K em> %K S< %K /em> %K -poset %U http://lxbwk.njournal.sdu.edu.cn/CN/10.6040/j.issn.1671-9352.0.2014.244