The linear chain as an extremal value of VDB topological indices of polyomino chains

ABSTRACT: We give conditions on the numbers {ϕij} under which a vertex degree-based topological index T I of the form T I (G) = X 1≤i≤j≤n−1 mijϕij , where G is a graph with n vertices and mij is the number of ij-edges, has the linear chain as an extreme value among all polyomino chains. As a consequ...