1) δ-open(closed)sets
δ-开(闭)集
2) δ-open sets
δ-开集
1.
It is that the all δ-open sets are open sets,all open sets are α-open sets,α-open sets are semi-open sets and preopen sets,semi-open sets or preopen sets are β-open sets.
在一般拓扑空间中讨论了抽象集合的概念,研究了其性质,得出如下结论,即:所有的δ-开集都是开集,所有开集又都是α-开集,α-开集是半开集且预开集,半开集或预开集是β-开集,反之则不成立。
3) δ-open L-sets
δ-开L-集
1.
A notion called δ-compactness is presented in L-topological spaces by means of δ-open L-sets and their inequality, where L is a complete De Morgan algebra.
在L-拓扑空间中借助于δ-开L-集和它们的不等式给出了δ-紧性的定义,这里L是完备的De Morgan代数。
4) clopen set
开闭集
1.
The relationships of clopen sets in [Specl(R),Γ2(R)] and idempotents in R are investigated.
且建立了[Specl(R),Γ2(R)]的开闭集与环R的幂等元之间的关系。
2.
In this paper,the relationships of Sl(R) s normality and Gelfand rings,and of clopen sets in Sl(R) and idempotents in R,will be studied.
本文主要研究所有包含L(R)的左素理想谱Sl(R)的正规性与环的Gelfand性、Sl(R)的开闭集与环的幂等元的关系。
5) θ-open(closed)set
θ-开(闭)集
6) clopen set
闭开集
补充资料：产后阴道开而不闭
产后阴道开而不闭
病名。见明·朱 ■等《普济方 ·卷三百二十六》。指妇人产后，阴道松弛，阴道口过大未能复原者。多因产后失于调护， 风侵产门所致。治宜祛风散寒。方用石灰一斗熬，令烧草以水二斗投之，适寒温，入汁中坐 渍，须臾复易，坐如常法。即产门不闭。详见该条。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条