On the difference between the eccentric connectivity index and eccentric distance sum of graphs

Yaser Alizadeh, Sandi Klavžar

The eccentric connectivity index of a graph $G$ is ${\xi }^c(G)={\sum }_{v\in V(G)}\epsilon (v)°(v)$, and the eccentric distance sum is ${\xi }^d(G)={\sum }_{v\in V(G)}\epsilon (v)D(v)$,…