摘要
对有限集上满足一定性质的拓扑的个数进行研究,得到如下结论:有限集X_n上使maxac T为平凡拓扑,minacT为离散拓扑的拓扑T至少有(?)G_n^m(2~n-2^(m+1)-2^(n-m+1)+5)个.
This paper investigates a series of properties of some special topologies on finite set and gets a conclusion about numbers of some special topologies on finite set.
出处
《宁德师专学报(自然科学版)》
2006年第3期225-227,230,共4页
Journal of Ningde Teachers College(Natural Science)
关键词
有限集
单拓扑
自同余拓扑
finite set
simple topology
selfcomplement topology