Abstract
This paper analyzes global error bounds of one-stage explicit extended Runge–Kutta–Nyström integrators for semilinear wave equations. The analysis is presented by using spatial semidiscretizations with periodic boundary conditions. Optimal second-order convergence is proved without requiring Lipschitz continuous and higher regularity of the exact solution. Moreover, the error analysis is not restricted to the spectral semidiscretization in space.
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Acknowledgments
The authors are sincerely thankful to two anonymous reviewers for their valuable comments.
Funding
The research is supported in part by the Alexander von Humboldt Foundation, by NSF of Shandong Province (Outstanding Youth Foundation, no. ZR2017JL003), and by NSFC (no.11671200).
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Dedicated to John Butcher on the occasion of his 85th birthday.
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Wang, B., Wu, X. Global error bounds of one-stage extended RKN integrators for semilinear wave equations. Numer Algor 81, 1203–1218 (2019). https://doi.org/10.1007/s11075-018-0585-0
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DOI: https://doi.org/10.1007/s11075-018-0585-0
Keywords
- Error bounds
- Semilinear wave equations
- Extended Runge–Kutta–Nyström integrators
- Trigonometric integrators