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Št. zadetkov: 2
ǂThe ǂ[sigma]-irregularity of chemical trees
Žana Kovijanić-Vukićević, Goran Popivoda, Saša Vujošević, Riste Škrekovski, Darko Dimitrov
Izvirni znanstveni članek
Oznake: nepravilnost grafov;Albertsonov indeks nepravilnosti;sigma indeks nepravilnosti;irregularity of a graph;▫$\sigma$▫-irregularity index;chemical trees with extremal irregularity;
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 characteriz ...
Leto: 2024 Vir: Fakulteta za matematiko in fiziko (UL FMF)
ǂThe ǂ[sigma]-irregularity of trees with maximum degree 5
Darko Dimitrov, Žana Kovijanić-Vukićević, Goran Popivoda, Jelena Sedlar, Riste Škrekovski, Saša Vujošević
Izvirni znanstveni članek
Oznake: regular graph;trees;maximum degree;[sigma]-irregularity;maximal graphs;graph measure;topological index;
The ▫$\sigma$▫-irregularity, a variant of the well-established Albertson irregularity, is a topological invariant defined for a graph ▫$G=(V,E)$▫ as ▫$\sigma (G) = \sum_{u,v \in E}(d(u) - d(v))^2$▫, where ▫$d(u)$▫ and ▫$d(v)$▫ denote the degrees of vertices ▫$u$▫ and ▫$v$▫, respectively. Recent rese ...
Leto: 2026 Vir: Digitalni repozitorij raziskovalnih organizacij Slovenije
Št. zadetkov: 2
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