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Approximate inversion method for time-fractional subdiffusion equations
Lu, Xin1; Pang, Hong-Kui2; Sun, Hai-Wei3; Vong, Seak-Weng3

The finite-difference method applied to the time-fractional subdiffusion equation usually leads to a large-scale linear system with a block lower triangular Toeplitz coefficient matrix. The approximate inversion method is employed to solve this system. A sufficient condition is proved to guarantee the high accuracy of the approximate inversion method for solving the block lower triangular Toeplitz systems, which are easy to verify in practice and have a wide range of applications. The applications of this sufficient condition to several existing finite-difference schemes are investigated. Numerical experiments are presented to verify the validity of theoretical results.

KeywordApproximate Inversion Method Block Lower Triangular Toeplitz Matrix Fast Fourier Transforms Matrix Polynomial Time-fractional Subdiffusion Equations
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Indexed BySCIE
WOS Research AreaMathematics
WOS SubjectMathematics, Applied ; Mathematics
WOS IDWOS:000424826400002
The Source to ArticleWOS
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Cited Times [WOS]:11   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
Corresponding AuthorSun, Hai-Wei
Affiliation1.School of Mathematics and Big Data,Foshan University, Foshan, Guangdong528000, China
2.School of Mathematics and Statistics,Jiangsu Normal University, Xuzhou,Jiangsu 221116, China
3.Department of Mathematics, Universityof Macau, Macao
Recommended Citation
GB/T 7714
Lu, Xin,Pang, Hong-Kui,Sun, Hai-Wei,et al. Approximate inversion method for time-fractional subdiffusion equations[J]. NUMERICAL LINEAR ALGEBRA WITH APPLICATIONS,2018,25(2).
APA Lu, Xin,Pang, Hong-Kui,Sun, Hai-Wei,&Vong, Seak-Weng.(2018).Approximate inversion method for time-fractional subdiffusion equations.NUMERICAL LINEAR ALGEBRA WITH APPLICATIONS,25(2).
MLA Lu, Xin,et al."Approximate inversion method for time-fractional subdiffusion equations".NUMERICAL LINEAR ALGEBRA WITH APPLICATIONS 25.2(2018).
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