Definable K\H{o}nig theorems

Matt Bowen; Felix Weilacher

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arXiv · 2112.10222

Definable K\H{o}nig theorems

Matt Bowen·Felix Weilacher

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Abstract

Let $X$ be a Polish space with Borel probability measure $\mu,$ and let $G$ be a Borel graph on $X$ with no odd cycles and maximum degree $\Delta(G).$ We show that the Baire measurable edge chromatic number of $G$ is at most $\Delta(G)+1$, and if $G$ is $\mu$-hyperfinite then the $\mu$-measurable edge chromatic number obeys the same bound. More generally, we show that $G$ has Borel edge chromatic number at most $\Delta(G)$ plus its asymptotic separation index.

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BibTeX RIS

Matt Bowen, Felix Weilacher. 2021-12-19. Definable K\H{o}nig theorems. https://arxiv.org/abs/2112.10222

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