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The Rainbow Arborescence Problem on Cycles

Year: 2025
Type: preprint
Abstract: The rainbow arborescence conjecture posits that if the arcs of a directed graph with $n$ vertices are colored by $n-1$ colors such that each color class forms a spanning arborescence, then there is a spanning arborescence that contains exactly one arc of every color. We prove that the conjecture is true if the underlying undirected graph is a cycle.
Authors: Bérczi, Kristóf, Király, Tamás, Yamaguchi, Yutaro, Yokoi, Yu
Open Access status: green
OpenAlex ID: W7104622857
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