New results on Wiener index of trees with a given diameterBorovićanin, Bojana (Avtor) Božović, Dragana (Avtor) Glogić, Edin (Avtor) Mesarič Štesl, Daša (Avtor) Špacapan, Simon (Avtor) Zogić, Emir (Avtor) Wiener indextreesdiameterWe study the Wiener index of a class of trees with fixed diameter and order. A double broom is a tree such that there exist two vertices u and v, such that each leaf of T is adjacent to u or v. We prove that for a tree T of diameter d and (sufficiently large) order n such that , T has maximum Wiener index (in the class of trees of diameter d and order n) if and only if T is a balanced double broom. Our results are sharp up to a small constant.Taylor & Francis20262026-09-18 12:02:49Članek v reviji100466sl©2026The Author(s)