A generalization of Villarreal's result for unmixed tripartite graphs

Document Type : Research Paper


K. N. Toosi University of Technology


‎In this paper we give a characterization of unmixed tripartite‎
‎graphs under certain conditions which is a generalization of a‎
‎result of Villarreal on bipartite graphs‎. ‎For bipartite graphs two‎
‎different characterizations were given by Ravindra and Villarreal‎.
‎We show that these two characterizations imply each other‎.


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