Two spectral Legendre's derivative algorithms for Lane-Emden, Bratu equations, and singular perturbed problems

M Abdelhakem, YH Youssri - Applied Numerical Mathematics, 2021 - Elsevier
This research aims to assemble two methodical spectral Legendre's derivative algorithms to
numerically attack the Lane-Emden, Bratu's, and singularly perturbed type equations. We …

Numerical, approximate solutions, and optimal control on the deathly lassa hemorrhagic fever disease in pregnant women

M Higazy, A El-Mesady, AMS Mahdy… - Journal of Function …, 2021 - Wiley Online Library
This paper is devoted to the model of Lassa hemorrhagic fever (LHF) disease in pregnant
women. This disease is a biocidal fever and epidemic. LHF disease in pregnant women has …

[HTML][HTML] Pseudo-spectral matrices as a numerical tool for dealing BVPs, based on Legendre polynomials' derivatives

M Abdelhakem, H Moussa - Alexandria Engineering Journal, 2023 - Elsevier
The pseudo-spectral method is used as a technique to employ the first derivative of the well-
known Legendre polynomials (FDLs) as novel basis functions. Then, the FDLs Gauss …

[HTML][HTML] Shifted ultraspherical pseudo-Galerkin method for approximating the solutions of some types of ordinary fractional problems

M Abdelhakem, D Mahmoud, D Baleanu… - Advances in Difference …, 2021 - Springer
In this work, a technique for finding approximate solutions for ordinary fraction differential
equations (OFDEs) of any order has been proposed. The method is a hybrid between …

Shifted Legendre fractional pseudospectral differentiation matrices for solving fractional differential problems

M Abdelhakem, D Abdelhamied, MG Alshehri… - Fractals, 2022 - World Scientific
A new differentiation technique, fractional pseudospectral shifted Legendre differentiation
matrices (FSL D-matrices), was introduced. It depends on shifted Legendre polynomials …

[HTML][HTML] Significance of cold cylinder in heat control in power law fluid enclosed in isosceles triangular cavity generated by natural convection: A computational …

IA Shah, S Bilal, A Akgül, M Omri, J Bouslimi… - Alexandria Engineering …, 2022 - Elsevier
The selection of appropriate geometrical characteristics of enclosure has salient influence
on performance of different thermal engineering processes and devices like …

[HTML][HTML] Monic Chebyshev pseudospectral differentiation matrices for higher-order IVPs and BVPs: applications to certain types of real-life problems

M Abdelhakem, A Ahmed, D Baleanu… - … and Applied Mathematics, 2022 - Springer
We introduce new differentiation matrices based on the pseudospectral collocation method.
Monic Chebyshev polynomials (MCPs) were used as trial functions in differentiation …

Tau and Galerkin operational matrices of derivatives for treating singular and Emden–Fowler third-order-type equations

WM Abd-Elhameed, HM Ahmed - International Journal of Modern …, 2022 - World Scientific
In this paper, our target is to implement and analyze numerical algorithms for the numerical
solutions of initial and boundary third-order singular-type equations, and in particular the …

[HTML][HTML] Approximating real-life BVPs via Chebyshev polynomials' first derivative pseudo-Galerkin method

M Abdelhakem, T Alaa-Eldeen, D Baleanu… - Fractal and …, 2021 - mdpi.com
An efficient technique, called pseudo-Galerkin, is performed to approximate some types of
linear/nonlinear BVPs. The core of the performance process is the two well-known weighted …

A robust spectral treatment of a class of initial value problems using modified Chebyshev polynomials

YH Youssri, WM Abd‐Elhameed… - … Methods in the …, 2021 - Wiley Online Library
New modified shifted Chebyshev polynomials (MSCPs) have been constructed over the
interval [α, β]. These polynomials are utilized as basis functions with the application of the …