English

Topological Indices Among Strong Support Vertex

Combinatorics 2025-05-13 v1

Abstract

In this paper, we provide the irregularity properties of trees with strong support vertex by analyzing two prominent topological indices: the Albertson index and the Sigma index. We further establish extremal bounds for both indices across families of trees defined by given degree sequences. Let T1T_1 and T2T_2 be a star trees of order nn, where T1T2T_1 \cong T_2, then, we provide Albertson index of T1T2T_1 \cong T_2. Let Tn,Δ\mathcal{T}_{n, \Delta} be a class of trees with nn vertices, there are a tree TTn,ΔT^{\prime} \in \mathcal{T}_{n, \Delta} such that \irr(T)<\irr(T)\irr(T^{\prime}) < \irr(T).

Keywords

Cite

@article{arxiv.2505.07774,
  title  = {Topological Indices Among Strong Support Vertex},
  author = {Jasem Hamoud and Duaa Abdullah},
  journal= {arXiv preprint arXiv:2505.07774},
  year   = {2025}
}

Comments

12 pages, 2 figures, 1 table, Comments welcome!