A technique for constructing examples
van Douwen, Eric K.
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van Douwen, Eric K.
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Tall, F. D.
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Teodor Przymusiński (1980)
Fundamenta Mathematicae
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K. Alster, T. Przymusiński (1976)
Fundamenta Mathematicae
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Aleksander V. Arhangel'skii, Miroslav Hušek (2008)
Commentationes Mathematicae Universitatis Carolinae
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In some sense, a dual property to that of Valdivia compact is considered, namely the property to be embedded as a closed subspace into a complement of a -subproduct of a Tikhonov cube. All locally compact spaces are co-Valdivia spaces (and only those among metrizable spaces or spaces having countable type). There are paracompact non-locally compact co-Valdivia spaces. A possibly new type of ultrafilters lying in between P-ultrafilters and weak P-ultrafilters is introduced. Under Martin...
Dontchev, J., Ganster, M., Kanibir, A. (1999)
Acta Mathematica Universitatis Comenianae. New Series
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