极大(序列)紧拓扑
Maximal (sequentially) compact topologies
摘要:
我们重新审视了已知的问题是否每个紧拓扑包含在一个极大紧拓扑,并收集了一些部分答案。例如,我们证明了每个紧拓扑包含在一个紧拓扑中,其中收敛序列具有唯一的极限。我们还回答了一个关于D. E. Cameron证明了每个序列紧拓扑都包含在极大序列紧拓扑中.最后,我们观察到每个sober紧T_1-拓扑都包含在极大紧拓扑中,并且每个局部紧或序列的sober紧T_1-拓扑都是极大紧拓扑族的下确界。
英文摘要:
We revisit the known problem whether each compact topology is contained in a maximal compact topology and collect some partial answers to this question. For instance we show that each compact topology is contained in a compact topology in which convergent sequences have unique limits. We also answer a question of D.E. Cameron by showing that each sequentially compact topology is contained in a maximal sequentially compact topology. We finally observe that each sober compact T_1-topology is contained in a maximal compact topology and that each sober compact T_1-topology which is locally compact or sequential is the infimum of a family of maximal compact topologies.
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