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Vestnik SamGU. Estestvenno-Nauchnaya Ser., 2014, Issue 10(121), Pages 68–73
(Mi vsgu450)
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Mathematics
Linearly ordered space whose square and higher powers cannot be condensed onto a normal space
O. I. Pavlov Peoples’ Friendship University of Russia, Moscow, 117198, Russian
Federation
(published under the terms of the Creative Commons Attribution 4.0 International License)
Abstract:
One of the central tasks in the theory of condensations is to describe topological properties that can be improved by condensation (i.e. a continuous one-to-one mapping). Most of the known counterexamples in the field deal with non-hereditary properties. We construct a countably compact linearly ordered (hence, monotonically normal, thus “very strongly” hereditarily normal) topological space whose square and higher powers cannot be condensed onto a normal space. The constructed space is necessarily pseudocompact in all the powers, which complements a known result on condensations of non-pseudocompact spaces.
Keywords:
condensation, normality, linearly ordered space, pseudocompact, Cartesian product, monotonically normal, Stone–Cech compactification, Tychonoff plank.
Received: 26.05.2014
Citation:
O. I. Pavlov, “Linearly ordered space whose square and higher powers cannot be condensed onto a normal space”, Vestnik Samarskogo Gosudarstvennogo Universiteta. Estestvenno-Nauchnaya Seriya, 2014, no. 10(121), 68–73
Linking options:
https://www.mathnet.ru/eng/vsgu450 https://www.mathnet.ru/eng/vsgu/y2014/i10/p68
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Abstract page: | 230 | Full-text PDF : | 70 | References: | 47 |
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