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most citedIrregularity and Topological Indices in Fibonacci Word Trees and Modified Fibonacci Word Index

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math.CO2025

Density Characterization with The Upper Bound of Density of Fibonacci Word

Duaa Abdullah, Jasem Hamoud

This paper investigates the natural density and structural relationships within Fibonacci words, the density of a Fibonacci word is where deno…

math.CO2025

Closed-Form Analysis and Extremal Bounds of Albertson and Sigma Indices in Trees with Prescribed Degree Sequences

Jasem Hamoud, Alexey Belov Yakovlevich, Muaadh Almahalebi +1

This study explores the irregularity properties of trees with prescribed degree sequences by analyzing two prominent topological indices: the Albertson index and the sigma index. W…

math.CO2025

Optimal Behaviour in Extremal Bounds for -Irregularity

Jasem Hamoud, Duaa Abdullah

In this paper, we establishe the extremal bounds of the topological indices -- Sigma index -- focusing on analyzing the sharp upper bounds and the lower bounds of the Sigma index,…

math.CO2025

Extremal Bounds on the Sigma and Albertson Indices for Non-Decreasing Degree Sequences

Jasem Hamoud, Duaa Abdullah

We establish sharp extremal bounds on the Albertson and Sigma irregularity indices for trees with prescribed degree sequences, with emphasis on caterpillar trees as key extremal co…

math.CO2025

The Exponential Hyper-Zagreb Indices and Structural Properties of Trees and Bipartite Graphs

Jasem Hamoud

In this paper, we investigate the structural properties of trees and bipartite graphs through the lens of topological indices and combinatorial graph theory. We focus on the First…

math.CO2025

Bounds of Trees with Degree Sequence-Based Topological Indices on Specialized Graph Classes

Jasem Hamoud, Duaa Abdullah

In this paper, the investigates Adriatic indices, specifically the sum lordeg index where it defined as and the variable sum ex…