Hyper-Wiener index and Laplacian spectrum
Hyper-Wiener index and Laplacian spectrum
The hyper-Wiener index WWW of a chemical tree T is defined as the sum of the product n1 n2 n3, over all pairs ?,? of vertices of T, where n1 and n2 are the number of vertices of T, lying on the two sides of the path which connects ? …