In graph theory, many topological indices based on vertex and edge distances are utilized in theoretical chemistry. Even though there are many such indices, we restrict our attention in this paper to the vertex Padmakar-Ivan index $PI_v(G)$ and the edge Padmakar-Ivan index $PI_e(G)$ of a simple connected graph $G$ without directed edges. We shall emphasize the computation of the vertex and edge Padmakar-Ivan indices of unitary Cayley graphs, $X_n$.
"Vertex and Edge Padmakar-Ivan Indices of Unitary Cayley Graphs." Missouri J. Math. Sci. 31 (2) 146 - 151, November 2019. https://doi.org/10.35834/2019/3102146