Convergence of consistent and inconsistent finite difference schemes and an acceleration technique

Convergence of consistent and inconsistent finite difference schemes and an acceleration technique
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一致和不一致有限差分格式的收敛和加速技术

DOI:
10.1016/s0377-0427(01)00522-2
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发表时间:
2002
影响因子:
2.4
通讯作者:
Tetsuro Yamamoto
Tetsuro Yamamoto
中科院分区:
数学2区
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--
作者:
Tetsuro Yamamoto

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本文陈述并概括了作者自己或与同事合作获得的关于有界域 Ω 中狄利克雷问题的有限差分方法的一些最新结果。在陈述了精确解 u 属于 C4( Ω ̄ ) 的情况下有限差分解的超收敛性质后,我们注意到,如果 u∉C4( Ω ̄ ) ,则该性质一般不成立。接下来,给出了在某些假设下不一致方案的收敛定理。此外,结果表明,通过坐标变换可以提高近似解的精度。还给出了数值例子。
This paper states and generalizes in part some recent results on finite difference methods for Dirichlet problems in a bounded domain Ω which the author has obtained by himself or with coworkers. After stating a superconvergence property of finite difference solution for the case where the exact solution u belongs to C4( Ω ̄ ) , it is remarked that such a property does not hold in general if u∉C4( Ω ̄ ) . Next, a convergence theorem is given for inconsistent schemes under some assumptions. Furthermore, it is shown that the accuracy of the approximate solution can be improved by a coordinate transformation. Numerical examples are also given.
Qing Fang 和 Tetsuro Yamamoto:“对流扩散问题的有限差分近似的超收敛”数值线性代数及其应用(即将出版)。
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