There exists a counterexample showing that a compacttopologicalspace is not necessarily a sequentially compact space.
有反例表明一个紧致拓扑空间不一定是序列紧致的拓扑空间。
2
Aim to study the existence of the extreme points of a compact set in linear topologicalspace.
目的研究线性拓扑空间中紧集端点存在性问题。
3
According to the concept of topological chain recurrent, a special flow "non-compact flow" is introduced on metric space, some properties and examples of this flow are given.