20.500.12556/RUL-155055 The $\sigma$-irregularity of chemical trees The $\sigma$-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. irregularity of a graph $\sigma$-irregularity index chemical trees with extremal irregularity nepravilnost grafov Albertsonov indeks nepravilnosti sigma indeks nepravilnosti true false true Angleški jezik Slovenski jezik Članek je objavljen v odprtodostopni reviji – glej spletno stran revije https://match.pmf.kg.ac.rs/. (Datum opombe: 12. 9. 2024) Članek v reviji 2024-03-18 12:04:35 2024-03-18 12:04:35 2024-09-12 11:37:13 0000-00-00 00:00:00 2024 0 0 Str. 267-282 iss. 1 Vol. 91 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 519.17 3009-4399 10.46793/match.91-1.267K 172397571 match91n1_267-282-4.pdf match91n1_267-282-4.pdf 1 F4D33405DA9AB2C45BE673A45C558C45 b4b83430ec6669feb36949a9cb0a99b5aa18786f5d9e11f5d7feb42f0c264f09 9689dcb9-e517-11ee-ae74-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=181789 https://match.pmf.kg.ac.rs/issues/m91n1/m91n1_267-282.html 0 a8fe9542-70e0-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=190515 Fakulteta za matematiko in fiziko 0 0 0