| Authors | A. Ghalavand and A. R. Ashrafi |
|---|---|
| Journal | Applied Mathematics and Computation |
| Page number | 19-23 |
| Volume number | 303 |
| Paper Type | Full Paper |
| Published At | 2017 |
| Journal Grade | ISI |
| Journal Type | Typographic |
| Journal Country | United States |
Abstract
The variable sum exdeg index of a graph G is defined as SEI_a(G ) = sigma_{uv ∈ E(G )} [ a deg G (u ) + a deg G (v ) ] , where a e 1 is a positive real number. The aim of this paper is applying the majorization technique to obtain the maximum and minimum values of variable sum exdeg index of trees, unicyclic, bicyclic and tricyclic graphs.