Numerical learning approximation of time-fractional sub diffusion model on a semi-infinite domain

Z Hajimohammadi, K Parand - Chaos, Solitons & Fractals, 2021 - Elsevier
The propose of this research is to apply a novel numerical learning approximation of time-
fractional sub diffusion model on a semi-infinite domain. This model is a nonlinear fractional …

Jacobi–Sobolev orthogonal polynomials and spectral methods for elliptic boundary value problems

X Yu, Z Wang, H Li - Communications on Applied Mathematics and …, 2019 - Springer
Generalized Jacobi polynomials with indexes α, β ∈ R α, β∈ R are introduced and some
basic properties are established. As examples of applications, the second-and fourth-order …

Diagonalized Legendre spectral methods using Sobolev orthogonal polynomials for elliptic boundary value problems

Q Ai, H Li, Z Wang - Applied Numerical Mathematics, 2018 - Elsevier
Fully diagonalized spectral methods using Sobolev orthogonal/biorthogonal basis functions
are proposed for solving second order elliptic boundary value problems. We first construct …

Spectral methods in space and time for parabolic problems on semi-infinite domains

X Yu, Z Wang - Calcolo, 2023 - Springer
In this paper, we introduce three series of Jacobi rational basis functions on the half line by
using the matrix decomposition technique. The new basis functions are simultaneously …

A study on Sobolev orthogonal polynomials on a triangle

R Aktaş Karaman, EG Lekesiz, Y Aygar - Numerical Algorithms, 2023 - Springer
The main aim of this paper is to investigate Sobolev orthogonality and families of orthogonal
polynomials on the triangle as a generalization of the results in Xu, Y. Constr. Approx. 46 …

[PDF][PDF] Diagonalized Chebyshev rational spectral methods for second-order elliptic problems on unbounded domains

Y Ren, X Yu, Z Wang - Numer. Math. Theor. Meth. Appl, 2019 - global-sci.com
Diagonalized Chebyshev rational spectral methods for solving second-order elliptic
problems on the half/whole line are proposed. Some Sobolev bi-orthogonal rational basis …

[HTML][HTML] Asymptotics of Sobolev orthogonal polynomials for Hermite (1, 1)-coherent pairs

HD Ruiz, FM Español, AM Molano - Journal of Mathematical Analysis and …, 2018 - Elsevier
In this paper we will discuss asymptotic properties of monic polynomials {S n λ (x)} n≥ 0
orthogonal with respect to the Sobolev inner product< p, q> S=∫ R p (x) q (x) d μ 0+ λ∫ R …

Improved Laguerre Spectral Methods with Less Round-off Errors and Better Stability

S Huang, H Yu - arXiv preprint arXiv:2212.13255, 2022 - arxiv.org
Laguerre polynomials are orthogonal polynomials defined on positive half line with respect
to weight $ e^{-x} $. They have wide applications in scientific and engineering computations …

Hermite–Sobolev orthogonal functions and spectral methods for second-and fourth-order problems on unbounded domains

Y Liu, X Yu, Z Wang, H Li - International Journal of Computer …, 2019 - Taylor & Francis
Hermite spectral methods using Sobolev orthogonal/biorthogonal basis functions for solving
second and fourth-order differential equations on unbounded domains are proposed. Some …

Sobolev orthogonal Legendre rational spectral methods for problems on the half line

S Li, Q Li, Z Wang - Mathematical Methods in the Applied …, 2020 - Wiley Online Library
Modified Legendre rational spectral methods for solving second‐order differential equations
on the half line are proposed. Some Sobolev orthogonal Legendre rational basis functions …