Authors: Ruy Fabila-Monroy ¹; David Flores-Peñaloza ²; Clemens Huemer ³; Ferran Hurtado ⁴; Jorge Urrutia ¹; David R. Wood ⁵

• 1 Instituto de Matematicas [México]
• 2 Departamento de Matematicas [Mexico]
• 3 Applied Mathematics IV Department
• 4 Departament de Matemàtica Aplicada II
• 5 Department of Mathematics and Statistics [Melbourne]

This paper studies the chromatic number of the following four flip graphs (under suitable definitions of a flip): the flip graph of perfect matchings of a complete graph of even order, the flip graph of triangulations of a convex polygon (the associahedron), the flip graph of non-crossing Hamiltonian paths of a set of points in convex position, and the flip graph of triangles in a convex point set. We give tight bounds for the latter two cases and upper bounds for the first two.