4 papers
The expected subtree number index in random polyphenylene and spiro chains
Yu Yang, Xiao-Jun Sun, Jia-Yi Cao +2
Subtree number index of a graph is the number of nonempty subtrees of . It is a structural and counting based topological index that has received more and mo…
Variations of the eccentricity and their properties in trees
Ya-Hong Chen, Hua Wang, Xiao-Dong Zhang
Motivated from the study of eccentricity, center, and sum of eccentricities in graphs and trees, we introduce several new distance-based global and local functions based on the sma…
Maximum atom-bond connectivity index with given graph parameters
Xiu-Mei Zhang, Yu Yang, Hua Wang +1
The atom-bond connectivity (ABC) index is a degree-based topological index. It was introduced due to its applications in modeling the properties of certain molecular structures and…
Eccentricity Sums in Trees
Heather Smith, László Székely, Hua Wang
The eccentricity of a vertex, , was one of the first, distance-based, tree invariants studied. The total eccentricity of a tree, , is the…