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The Alon-Tarsi number of planar graphs -- a simple proof

Published 30 Mar 2022 in math.CO | (2203.16308v1)

Abstract: This paper gives a simple proof of the result that every planar graph GG has Alon-Tarsi number at most 5, and has a matching MM such that G−MG-M has Alon-Tarsi number at most 4.

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