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Unfriendly partitions of locally finite Borel graphs

Pelayo-Gómez, José de Jesús
arXiv (All) · Papers
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combinatoricslogic
We answer in the negative the question of Thomas, recorded by Conley, Conley--Marks--Unger, and Conley--Tamuz, of whether every locally finite Borel graph admits a Borel unfriendly partition. Our counterexample has unbounded degree and is closed on a zero-dimensional Polish space; its connectedness
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