Clique-Inverse Graphs of Bipartite Graphs

Fabio Protti1, Jayme L. Szwarcfiter2
1 Universidade Federal do Rio de Janeiro Caixa Postal 2324, 20001-970, Rio de Janeiro, Brazil
2 Universidade Federal do Rio de Janeiro Caixa Postal 2324, 20001-970, Rio de Janeiro, Brazil

Abstract

The clique graph \(K(G)\) of a given graph \(G\) is the intersection graph of the collection of maximal cliques of \(G\). Given a family \(\mathcal{F}\) of graphs, the \emph{clique-inverse graphs} of \(\mathcal{F}\) are the graphs whose clique graphs belong to \(\mathcal{F}\). In this work, we describe characterizations for clique-inverse graphs of bipartite graphs, chordal bipartite graphs, and trees. The characterizations lead to polynomial time algorithms for the corresponding recognition problems.