子基是与拓扑有关的概念。设(X,T)为拓扑空间,S⊂T,若S的元的所有有限交的族为T的基,则称S为拓扑空间(X,T)的子基或拓扑S的子基,每一个非空集族S必是X=∪S上的某个拓扑的子基,并且该拓扑由S惟一确定,它是包含S的最小拓扑,一个拓扑可以有不同的子基,但子基确定惟一的拓扑。
量子基金 Quantum Fund ; Quantum Endowment Fund ; Quould likeum Fund ; Quantum Group
亚太经合组织城镇化子基金 sub-fund within the APEC framework
数字电子基础 Fundamental Digital Electionics
微子基金 microcle fund
电子基盘 Mahjong Electron Base ; Electron Base ; Electron Base Mahjong
伞子基金 umbrella fund
如计划为伞子基金 Umbrella Fund
吸电子基 electron-attracting grou ; electron withdrawing group ; acceptor group ; attractinggroup
猴子基因 Monkee Genes
X中每个有唯一聚点的可数开滤子基收敛于该聚点;
Every countable open filter base which has an only accumulation point in X is convergent to the accumulation point;
此外,文中界定了乘积空间中基与子基并研究了乘积空间与因子空间的关系。
We also study the base and subbase in the product space of I-fuzzy topological Spaces.
在最近由它们导入的关于子基的连通性基础上,给出了关于子基的局部连通性概念,并研究它的性质,得到一般拓扑学中局部连通性的一种推广。
We introduce and study connectedness relative to a subbase for the topology, and obtain their some properties, which generalize connectedness in a general topology.
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