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Set-Theoretic Topology

Vladimir Tkachuk (virtual)

Subevent of Set-Theoretic Topology - Sat. AM

Forbes 2070C

Eastern Time (US & Canada)

Starts at: 2025-03-08 10:45AM

Ends at: 2025-03-08 11:05AM

On discrete and disjoint shrinking properties

Vladimir Tkachuk ⟨vvtmdf@gmail.com⟩

Abstract:

A space $X$ has the disjoint (discrete) shrinking property if for any family ${U_n: n\in\omega}$ of non-empty open subsets of $X$ there exists a disjoint (discrete) family ${V_n:
n\in\omega}$ of non-empty open sets such that $V_n \subset U_n$ for every $n\in\omega$. We present a topological equivalent of the disjoint shrinking property in general spaces and apply it to characterize the disjoint shrinking property in topological groups and locally convex spaces.

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