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A High Order Method on Graded Meshes for a Time-Fractional Diffusion Problem

  • Hu Chen
  • Martin StynesEmail author
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11386)

Abstract

In a recent paper we showed numerically and theoretically that a straightforward generalisation of Alikhanov’s “L2-\(1_\sigma \)” scheme is \(O(M^{-2})\) accurate on suitably chosen graded meshes (with M time intervals) for initial-value problems (IVPs) and initial-boundary value problems (IBVPs) with a Caputo fractional time derivative of order \(\alpha \), whose solutions typically exhibit a weak singularity at the initial time \(t=0\). The present paper constructs a better generalisation of Alikhanov’s scheme that is demonstrated numerically to be \(O(M^{-(3-\alpha )})\) accurate for these classes of IVPs and IBVPs, but its rigorous analysis remains an open problem.

Keywords

Alikhanov scheme Caputo derivative 

Notes

Acknowledgements

The work of the first author was funded by the Chinese Postdoc Foundation Grant 2018M631316 and the National Natural Science Foundation of China young scientists fund Grant 11801026. The work of the second author was funded by the National Natural Science Foundation of China under grants 91430216 and NSAF-U1530401.

References

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Applied and Computational Mathematics DivisionBeijing Computational Science Research CenterBeijingChina

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