1) family of closed sets
闭集族
2) Closed convex sets
闭凸集族
4) weakly hereditarily closure-preserving families
弱遗传闭包保持集族
1.
This paper shows that weakly hereditarily closure-preserving families is CF*-families.
证明了弱遗传闭包保持集族是CF*集族。
6) closed set
闭集
1.
F is closed set if and only if L(x, θ ;Fc)=0 μ-a.
F是闭集当且仅当L(x,θ;Fc)=0μ-a。
2.
We discuss topologies for complex Jsymplectic spaces and prove that each complete JLagrangian submanifold of the complex Jsymplectic spaces a closed set.
讨论了有限维和无限维复J -辛空间上的拓扑 ,并证明了复J -辛空间的每一个完全J -Lagrangian子流形都是闭集 。
3.
The definitions of the closure operator and closed set of a poset matroid are given at first,followed by the discussion of their relative properties.
给出了偏序集拟阵的闭包算子和闭集的定义,并讨论了其相关性质,推广了拟阵理论中的有关结果,同时指出闭包算子和闭集在偏序集拟阵理论与拟阵理论中的区别和联系。
补充资料：闭集
闭集
dosed set
闭集ld吹d肥t买姗.叮l说M“馏ec佃]，拓扑空间中的 含有它的所有极限点〔见集合的极限点(】imjtpolnt of a set)、的集合.于是，闭集的补集的所有点都是内点，所以闭集可定义为开集的补集.闭集的概念是把拓扑空间定义为具有满足下列公理的特定集合系统〔所谓闭集)的作空集X的基础:X本身和空集是闭集;任意个闭集的交是闭集;有限个闭集的并是闭集.
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