Padmakar–Ivan index
= Padmakar–Ivan index
{wiki=Padmakar–Ivan_index}
The Padmakar–Ivan index, denoted as \\( PI(G) \\), is a graph theoretic invariant that reflects the structural properties of a graph \\( G \\). It is defined based on the path lengths between vertices in the graph and is used to study various features of chemical compounds, particularly in the field of chemical graph theory.