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Ultrafilters on balleans

A ballean (equivalently, a coarse structure) is an asymptotic counterpart of a uniform space. We introduce three ultrafilter satellites of a ballean (namely, corona, companion, and corona companion), evaluate the basic cardinal invariants of the corona and characterize the subsets of balleans in ter...

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Bibliographic Details
Date:	2015
Main Authors:	Protasov, I. V., Slobodianiuk, S. V., Протасов, І. В., Слободянюк, С. В.
Format:	Article
Language:	English
Published:	Institute of Mathematics, NAS of Ukraine 2015
Online Access:	https://umj.imath.kiev.ua/index.php/umj/article/view/2102
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Journal Title:	Ukrains’kyi Matematychnyi Zhurnal
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