Conjecture on the maximum dichromatic number of oriented triangle-free graphs

From papers

For each positive integer nn, let t(n)\vec t(n) be the maximum dichromatic number of an oriented triangle-free graph of order nn. Maximum dichromatic number conjecture.

t(n)=Θ ⁣(nlogn).\vec t(n)=\Theta\!\left(\sqrt{\frac{n}{\log n}}\right).

This conjecture is implied by the conjectured asymptotic order of the minimum acyclic number a(n)\vec a(n) and would determine the maximum dichromatic number up to constant factors.

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Sources & referencesView supporting material

Primary source

Pierre Aboulker, Frédéric Havet, François Pirot and Juliette Schabanel, “Minimum acyclic number and maximum dichromatic number of oriented triangle-free graphs of a given order”, arXiv:2403.02298 (2024).

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