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arXiv math/0204132math.GN
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拓扑空间的对偶序列是有限的

Sequence of dualizations of topological spaces is finite

Martin Maria Kovar

摘要:

第540章J.D. Lawson和M. Mislove在拓扑学中的开放问题中提出了一个问题,即对于相互重叠的拓扑,是否在进行了许多步骤之后就终止了。$T_1$空间的问题已经由G. E. 1966年的斯特雷克。对于超空间上的某些拓扑(不一定是$T_1$),布鲁斯·S. Burdick和他的解决方案于2000年在伊斯坦布尔举行的第一届土耳其国际拓扑会议上提出。本文对所有拓扑空间给出了该问题的完全正解。我们证明了对任何拓扑空间$(X,τ)$,它遵循$τ^{dd}=τ^{dddd}$。进一步地,我们根据取拓扑的过程所生成的拓扑的数目对拓扑空间进行分类。

英文摘要:

Problem 540 of J. D. Lawson and M. Mislove in Open Problems in Topology asks whether the process of taking duals terminate after finitely many steps with topologies that are duals of each other. The problem for $T_1$ spaces was already solved by G. E. Strecker in 1966. For certain topologies on hyperspaces (which are not necessarily $T_1$), the main question was in the positive answered by Bruce S. Burdick and his solution was presented on The First Turkish International Conference on Topology in Istanbul in 2000. In this paper we bring a complete and positive solution of the problem for all topological spaces. We show that for any topological space $(X,τ)$ it follows $τ^{dd}=τ^{dddd}$. Further, we classify topological spaces with respect to the number of generated topologies by the process of taking duals.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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