Abstract
The perfect matching polytope of a graph G is the convex hull of the incidence vectors of all perfect matchings in G. A graph is called perfect matching compact (shortly, PM-compact), if its perfect matching polytope has diameter one. This paper gives a complete characterization of simple PM-compact Hamiltonian bipartite graphs. We first define two families of graphs, called the H2C-bipartite graphs and the H23-bipartite graphs, respectively. Then we show that, for a simple Hamiltonian bipartite graph G with |V(G)| ≥ 6, G is PM-compact if and only if G is K 3,3, or G is a spanning Hamiltonian subgraph of either an H2C-bipartite graph or an H23-bipartite graph.
Similar content being viewed by others
References
Bian, H.P., Zhang, F.J. The graph of perfect matching polytope and an extreme problem. Discrete Mathematics. 309: 5017–5023 (2009)
Bondy, J.A., Murty, U.S.R. Graph Theory. Springer-Verlag, Berlin, 2008
Chvátal, V. On certain polytopes associated with graphs. Journal of Combinatorial Theory (B). 18: 138–154 (1975)
Lovász, L., Plummer, M.D. Matching Theory. Elsevier Science Publishers, B.V. North Holland, 1986
Naddef, D.J., Pulleyblank, W.R. Hamiltonicity in (0-1)-polytope. Journal of Combinatorial Theory (B), 37: 41–52 (1984)
Padberg, M.W., Rao, M.R. The travelling salesman problem and a class of polyhedra of diameter two. Mathematical Programming. 7: 32–45 (1974)
Schrijver, A. Combinatorial Optimization: Polyhedra and Efficiency. Springer-Verlag, Berlin, 2003
Wang, X.M., Shang, W.P., Lin, Y.X. A characterization of claw-free PM-compact cubic Graphs. Discrete Mathematics, Algorithms and Applications, 6(2): 1450025 (5 pages) (2014)
Author information
Authors and Affiliations
Corresponding author
Additional information
Supported by the National Natural Science Foundation of China under Grant No. 11101383, 11271338 and 11201432.
Rights and permissions
About this article
Cite this article
Wang, Xm., Yuan, Jj. & Lin, Yx. A characterization of PM-compact Hamiltonian bipartite graphs. Acta Math. Appl. Sin. Engl. Ser. 31, 313–324 (2015). https://doi.org/10.1007/s10255-015-0475-3
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10255-015-0475-3