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  5. 2026

General and Set-Theoretic Topology

Icon: calendar GSTT Session Talk #10B.1 | 2026 Jul 17 from 10:30AM to 10:55AM (Zagreb) | A0-1

Subevent of GSTT Session #10B

‟Topologies on the ring of Baire-one functions” by Atasi Debray <adrpm@caluniv.ac.in>, University of Calcutta, India

Abstract:

A Baire class-one (or simply Baire-one) function $f : X \rightarrow \mathbb{R}$ is a function that can be expressed as the pointwise limit of a sequence of continuous functions on a topological space $X$. It is well known that the collection $B_1(X)$ of all Baire-one functions forms an overring of the ring $C(X)$ of continuous functions. Although $B_1(X)$ has resemblances with $C(X)$ in its algebraic behaviour, it exhibits substantial differences, particularly when endowed with topologies analogous to those commonly considered on $C(X)$. The objective of this paper is to discuss $B_1(X)$ from topological perspective and observe the behaviour of $C(X)$ as its subspace.