Banff designs: difference methods for coloring incidence graphsBuratti, Marco (Avtor) Merola, Francesca (Avtor) Nakić, Anamari (Avtor) Rubio-Montiel, Christian (Avtor) Harmonious chromatic numberLevi graphcombinatorial designWe present some results on the harmonious colourings of the Levi graph of a 2-design, focusing on Steiner 2-design. It is easily seen that the harmonious chromatic number of such a Levi graph is at least the number of points of the design: we study and construct Banff designs, that is designs such that this lower bound is attained.Založba Univerze na Primorskem20252025-11-03 12:14:28Članek v reviji22073UDK: 519.17eISSN: 2590-9770DOI: 10.26493/2590-9770.1739.91csl