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 On the maximum number of edges in a graph with prescribed walk-nonrepetitive chromatic number. In <em>Proceedings of the 7th Theory of Computation Meeting</em>, July 31, 2022, Niterói, Brasil. SBC, Porto Alegre, Brasil, 41-44. DOI: <a href="https://doi.org/10.5753/etc.2022.222730">https://doi.org/10.5753/etc.2022.222730</a>.