Minimum Atom-Bond Sum-Connectivity Index of Trees With a Fixed Order and/or Number of Pendent Vertices

Tariq A. Alraqad, Igor Z. Milovanovic, Hicham Saber +3

Let $d_u$ be the degree of a vertex $u$ of a graph $G$. The atom-bond sum-connectivity (ABS) index of a graph $G$ is the sum of the numbers $(1-2(d_v+d_w{)}^{-1}{)}^{1/2}$ over all edg…