The strong Pytkeev∗^* property of topological spaces

preprint2016arXivOpen access

Abstract

Modifying the known definition of a Pytkeev network, we introduce a notion of Pytkeev∗^* network and prove that a topological space has a countable Pytkeev network if and only if XX is countably tight and has a countable Pykeev∗^* network. In the paper we establish some stability properties of the class of topological spaces with the strong Pytkeev∗^*-property.

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