Fractional centered difference scheme for high-dimensional integral fractional Laplacian

Z Hao, Z Zhang, R Du - Journal of Computational Physics, 2021 - Elsevier
In this work we study the finite difference method for the fractional diffusion equation with
high-dimensional hyper-singular integral fractional Laplacian. We first propose a simple and …

Discretised general fractional derivative

E Fan, C Li, M Stynes - Mathematics and Computers in Simulation, 2023 - Elsevier
A generalised fractional derivative (the ψ-Caputo derivative) is studied. Generalisations of
standard discretisations are constructed for this derivative: L1, L1-2, L2-1 σ for derivatives of …

Efficient Monte Carlo method for integral fractional Laplacian in multiple dimensions

C Sheng, B Su, C Xu - SIAM Journal on Numerical Analysis, 2023 - SIAM
In this paper, we develop a conditional Monte Carlo method for solving PDEs involving an
integral fractional Laplacian on any bounded domain in arbitrary dimensions. We first …

Fast spectral Petrov-Galerkin method for fractional elliptic equations

Z Hao, Z Zhang - Applied Numerical Mathematics, 2021 - Elsevier
In this work, we revisit the spectral Petrov-Galerkin method for fractional elliptic equations
with the general fractional operators. To prove the optimal convergence of the method, we …

Collocation methods for integral fractional Laplacian and fractional PDEs based on radial basis functions

Q Zhuang, A Heryudono, F Zeng, Z Zhang - Applied Mathematics and …, 2024 - Elsevier
We consider collocation methods for fractional elliptic equations with the integral fractional
Laplacian on general bounded domains using radial basis functions (RBFs). Leveraging the …

Optimal error estimates of spectral Galerkin method for mixed diffusion equations

Z Hao - Calcolo, 2023 - Springer
We present a highly accurate and efficient spectral Galerkin method for the advection–
diffusion–reaction equations with fractional lower-order terms in one dimension. We first …

A novel and simple spectral method for nonlocal PDEs with the fractional Laplacian

S Zhou, Y Zhang - Computers & Mathematics with Applications, 2024 - Elsevier
We propose a novel and simple spectral method based on the semi-discrete Fourier
transforms to discretize the fractional Laplacian (− Δ) α 2. Numerical analysis and …

A simple and fast finite difference method for the integral fractional Laplacian of variable order

Z Hao, S Shi, Z Zhang, R Du - arXiv preprint arXiv:2406.10524, 2024 - arxiv.org
For the fractional Laplacian of variable order, an efficient and accurate numerical evaluation
in multi-dimension is a challenge for the nature of a singular integral. We propose a simple …

A generalized fractional Laplacian

X Zheng, VJ Ervin, H Wang - arXiv preprint arXiv:2304.12419, 2023 - arxiv.org
In this article we show that the fractional Laplacian in $ R^{2} $ can be factored into a
product of the divergence operator, a Riesz potential operator, and the gradient operator …

Numerical approximation of optimal convergence for fractional elliptic equations with additive fractional Gaussian noise

Z Hao, Z Zhang - SIAM/ASA Journal on Uncertainty Quantification, 2021 - SIAM
We study numerical approximation for one-dimensional stochastic elliptic equations with
integral fractional Laplacian and the additive Gaussian noise of power-law: 1/f^β noise and …