The Hosoya index of a graph is defined as the total number of the matchings of the graph. In this paper, we determine the lower bounds for the Hosoya index of unicyclic graph with a given diameter. The corresponding extrenal graphs are characterized.
Citation
Shuchao Li, Zhongxun, Zhu. On the Hosoya Index of Unicyclic Graphs with a Given Diameter[J], Ars Combinatoria, Volume 114. 111-128. .