The difference between clique graphs and iterated clique graphs

Let G be the class of all graphs and K the clique operator. The validity of the equality K(G) = K²(G) has been an open question for several years. A graph in K(G) but not in K²(G) is exhibited here.Facultad de Ciencias ExactasDepartamento de Matemátic

The difference between clique graphs and iterated clique graphs

Let G be the class of all graphs and K the clique operator. The validity of the equality K(G)=K^2(G) has been an open question for several years. A graph in K(G) but not in K^2(G) is exhibited here.Fil: de Caria, Pablo Jesús. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata; Argentin