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Author

Y. Youssri

2 papers indexed here

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Sep 2026

Optimal Ultraspherical Spectral Method for Fractional Differential Equations: Parameter Optimization and Application to the Bagley-Torvik Equation

This paper introduces a novel optimal ultraspherical spectral method for solving fractional differential equations, with a particular focus on the Bagley-Torvik equation. We develop a comprehensive theoretical framework based on Gegenbauer (ultraspherical) polynomials [Formula: see text], where the ultraspherical param...

Y. Youssri, S. Sayed · 0 citations
Open access Aug 2026

On the asymptotic formula in the fourth-degree estermann problem with almost equal terms: Theory and numerical validation

This study investigates a class of number-theoretic problems related to representations of large integers as combinations of prime numbers and quartic terms, extending ideas originating from the Estermann problem. The authors focus on a refined ternary decomposition involving almost equal components, employing analytic...

A. Rahimzoda, D. Juraev, Y. Youssri · 0 citations

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