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On Baire property, compactness and completeness properties of spaces of Baire functions (2211.10765v2)

Published 19 Nov 2022 in math.GN

Abstract: A topological space $X$ is Baire if the intersection of any sequence of open dense subsets of $X$ is dense in $X$. One of the interesting problems for the space of Baire functions is the Banakh-Gabriyelyan problem: Let $\alpha$ be a countable ordinal. Characterize topological spaces $X$ and $Y$ for which the function space $B_{\alpha}(X,Y)$ is Baire. In this paper, for any Frechet space $Y$ , we have obtained a characterization topological spaces $X$ for which the function space $B_{\alpha}(X,Y)$ is Baire. In particular, we proved that $B_{\alpha}(X,\mathbb{R})$ is Baire if and only if $B_{\alpha}(X,Y)$ is Baire for any Banach space $Y$. Also we proved that many completeness and compactness properties coincide in spaces $B_{\alpha}(X,Y)$ for any Frechet space $Y$.

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