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Plenary and Semi-Plenary Talks

Semi-Plenary Session #4.2

Subevent of Semi-Plenary Session #4

Heritage Hall Building 106

Times: 2026 Mar 12 from 02:40PM to 03:25PM (Central Time (US & Canada))

On some new star selection principles among covering properties and separability

Davide Giacopello <davide.giacopello@unime.it>, University of Messina

Abstract:

We present some properties recently introduced by Bal and Bhowmik: the $R$-, $H$-, and $M$-star Lindelöfness.

These properties are defined via selection principles involving the star operator and lie between covering properties (in particular, star-covering properties) and certain selective strengthenings of separability.

This dual perspective leads to several implications and connections among known properties, some of which we present.

Additionally, we provide some examples. In particular, we prove that there exists a Tychonoff M-star Lindelöf space of cardinality $\frak{c}$ which is not $R$-star Lindelöf answering a question posed by Bal and Bhowmik.

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