The $\sigma$-irregularity of chemical treesKovijanić-Vukićević, Žana (Avtor) Popivoda, Goran (Avtor) Vujošević, Saša (Avtor) Škrekovski, Riste (Avtor) Dimitrov, Darko (Avtor) irregularity of a graph$\sigma$-irregularity indexchemical trees with extremal irregularityThe $\sigma$-irregularity index is a variant of the well-established Albertson irregularity index. For a graph $G = (V, E)$ it is defined as $\sigma (G) = \Sigma _{uv\in E}(d(u) − d(v))^2$, where $d(u)$ and $d(v)$ denote the degrees of vertices $u$ and $v$, respectively. In this note, we characterize chemical trees of a given order with maximal $\sigma$-irregularity index.20242024-03-18 12:04:35Članek v reviji155055slČlanek je objavljen v odprtodostopni reviji – glej spletno stran revije https://match.pmf.kg.ac.rs/. (Datum opombe: 12. 9. 2024)