Leap eccentric connectivity index of some graph operations with subdivided edges

Ling Song, Zikai Tang

The leap eccentric connectivity index of $G$ is defined as $$L{\xi }^C(G)=\sum _{v\in V(G)}{d}_2(v|G)e(v|G)$$ where $d_2(v|G)$ be the second degree of the vertex $v$ and $e(v|G)$ be…