Chi-Boundedness of graphs containing no cycles with k chords
Forum of Mathematics, Sigma, Tome 13 (2025) no. 1, p. e189

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We prove that the family of graphs containing no cycle with exactly k-chords is $\chi $-bounded, for k large enough or of form $\ell (\ell -2)$ with $\ell \ge 3$ an integer. This verifies (up to a finite number of values k) a conjecture of Aboulker and Bousquet (2015).
Lee, Joonkyung; Letzter, Shoham; Pokrovskiy, Alexey. Chi-Boundedness of graphs containing no cycles with k chords. Forum of Mathematics, Sigma, Tome 13 (2025) no. 1, p. e189. doi: 10.1017/fms.2025.10120
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