We provide a new proof of a result of Hanson and Toft classifying the maximum-size \(K_r\)-free graphs on \(n\) vertices with chromatic number at least \(r\).
Citation
Michael E. Picollelli. A Note on \(K_{r}\)-Free Graphs with Chromatic Number at least \(r\)[J], Journal of Combinatorial Mathematics and Combinatorial Computing, Volume 096. 217-222. DOI: .