Cut points in some connected topological spaces |
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Authors: | Devender Kumar Kamboj Vinod Kumar |
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Affiliation: | Department of Mathematics, Kurukshetra University, Kurukshetra, Haryana, 136119, India |
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Abstract: | We prove that a connected topological space with endpoints has exactly two non-cut points and every cut point is a strong cut point; it follows that such a space is a COTS and the only two non-cut points turn out to be endpoints (in each of the two orders) of the COTS. A non-indiscrete connected topological space with exactly two non-cut points and having only finitely many closed points is proved homeomorphic to a finite subspace of the Khalimsky line. Further, it is shown, without assuming any separation axiom, that in a connected and locally connected topological space X, for a, b in X, S[a,b] is compact whenever it is closed. Using this result we show that an H(i) connected and locally connected topological space with exactly two non-cut points is a compact COTS with end points. |
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Keywords: | 54F05 54F15 |
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