@article { author = {Haghighi, H.}, title = {A generalization of Villarreal's result for unmixed tripartite graphs}, journal = {Bulletin of the Iranian Mathematical Society}, volume = {40}, number = {6}, pages = {1505-1514}, year = {2014}, publisher = {Iranian Mathematical Society (IMS)}, issn = {1017-060X}, eissn = {1735-8515}, doi = {}, abstract = {‎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.}, keywords = {Well-covered graph‎,‎unmixed graph‎,‎perfect matching‎}, url = {http://bims.iranjournals.ir/article_581.html}, eprint = {http://bims.iranjournals.ir/article_581_aeadceab31733934bd4246afae35af37.pdf} }