Barycentric rational interpolation method for solving time-dependent fractional convection-diffusion equation

Autor:	Jin Li, Yongling Cheng
Jazyk:	angličtina
Rok vydání:	2023
Předmět:	barycentric rational interpolation collocation method time-dependent fractional convection-diffusion equation fractional derivative Mathematics QA1-939 Applied mathematics. Quantitative methods T57-57.97
Zdroj:	Electronic Research Archive, Vol 31, Iss 7, Pp 4034-4056 (2023)
Druh dokumentu:	article
ISSN:	2688-1594
DOI:	10.3934/era.2023205?viewType=HTML
Popis:	The time-dependent fractional convection-diffusion (TFCD) equation is solved by the barycentric rational interpolation method (BRIM). Since the fractional derivative is the nonlocal operator, we develop a spectral method to solve the TFCD equation to get the coefficient matrix as a full matrix. First, the fractional derivative of the TFCD equation is changed to a nonsingular integral from the singular kernel to a density function. Second, efficient quadrature of the new Gauss formula are constructed to simply compute it. Third, matrix equation of discrete the TFCD equation is obtained by the unknown function replaced by a barycentric rational interpolation basis function. Then, the convergence rate of BRIM is proved. Finally, a numerical example is given to illustrate our result.
Databáze:	Directory of Open Access Journals
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