University of Tabriz Computational Methods for Differential Equations 2345-3982 14 2 2026 04 01 A study of a fractal multi-pantograph delay model with varying coefficients using fractional order wavelets 828 851 19703 10.22034/cmde.2025.62311.2735 EN Deepak Singh Department of Mathematics and Statistics, Gurukula Kangari (Deemed to be University), Haridwar, 249404, Uttarakhand, India. Sag Ram Verma Department of Mathematics and Statistics, Gurukula Kangari (Deemed to be University), Haridwar, 249404, Uttarakhand, India. Journal Article 2024 07 01 Apart from using fractal dimensions to describe statistical self-similarity, exploring a direct measurement approach involves considering mathematical models capable of constructing a real-world fractal entity, as classical differential and integral operators cannot efficiently handle such problems. In this study, the fractal derivative is applied to develop a fractal model for multi-pantograph delay differential equations with variable coefficients. The wavelet approach, employing Jacobi fractional order wavelets, has been developed to attain a numerical solution. The proposed methodology relies on the utilization of the fractal integral operational matrix of Jacobi fractional-order wavelets combined with the collocation method. We have outlined pseudo-code and conducted a stability analysis for the methods proposed within the specified model. Furthermore, the convergence analysis of the approximate solution is presented through some lemmas and theorems. The numerical results and error analysis of some illustrative examples are also shown in the tables and graphs. In the proposed methods, numerical results are derived across various values of the fractal $(\mu)$ and fractional $(\phi)$ parameters. It is important to highlight that the classical scenario is retrieved when $\mu=1$. https://cmde.tabrizu.ac.ir/article_19703_a1228dab8228d96a4fe9834c5ef885e4.pdf