On the First Three Extremum Values of Variable Sum Exdeg Index of Trees
oleh: Shu-Bo Chen, Syed Sheraz Asghar, Muhammad Ahsan Binyamin, Zahid Iqbal, Tayyeb Mahmood, Adnan Aslam
| Format: | Article |
|---|---|
| Diterbitkan: | Wiley 2021-01-01 |
Deskripsi
For a graph G, its variable sum exdeg index is defined as SEIaG=∑xy∈EGadx+ady, where a is a real number other than 1 and dx is the degree of a vertex x. In this paper, we characterize all trees on n vertices with first three maximum and first three minimum values of the SEIa index. Also, we determine all the trees of order n with given diameter d and having first three largest values of the SEIa index.