arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1910.07367math.NAcs.NAmath.AP
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KdV方程二阶低正则积分的最优收敛性

Optimal convergence of a second order low-regularity integrator for the KdV equation

Yifei Wu, Xiaofei Zhao

摘要:

本文建立了(136,Numer.数学、2017)用于在粗糙初始数据下求解KdV方程。该方案是明确的和有效的实现。通过严格的误差分析,我们证明了对于任何$γ\geq0$,该格式对$H^{γ+4}$中的初始数据都具有$H^γ$中的二阶精度,其中正则性要求低于经典方法.数值实验证实了这一结果,并与Strang分裂格式进行了比较.

英文摘要:

In this paper, we establish the optimal convergence result of a second order exponential-type integrator from (136, Numer. Math., 2017) for solving the KdV equation under rough initial data. The scheme is explicit and efficient to implement. By rigorous error analysis, we show that the scheme provides the second order accuracy in $H^γ$ for initial data in $H^{γ+4}$ for any $γ\geq0$, where the regularity requirement is lower than the classical methods. The result is confirmed by numerical experiments and comparisons are made with the Strang splitting scheme.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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