The direct proof of the 4-leaf-tree with the maximal Hosoya index
Shumin Zhang · Journal of Qinghai Normal University · 2011
A Tree T is called a r-leaf-tree if T has r pendent vertices.In this paper,we research Hosoya index of 4-leaf-trees with order n and characterized the 4-leaf-trees with the maximal Hosoya index by of the construction.