Extrapolation for the second order elliptic problems by mixed finite element methods in three dimensions

被引：0
|
作者：
Xie, Hehu [1 ]
Jla, Shanghui [1 ]
机构：
[1] Chinese Acad Sci, Acad Math & Syst Sci, ICMSEC, LSEC, Beijing 100080, Peoples R China
来源：
INTERNATIONAL JOURNAL OF NUMERICAL ANALYSIS AND MODELING | 2008年 / 5卷 / 01期
关键词：
superconvergence; interpolation postprocessing; extrapolation; mixed finite element;
D O I：
暂无
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
In this paper we derive asymptotic error expansions for mixed finite element approximations of general second order elliptic problems in three dimensions. And extrapolation method is applied to improve the accuracy of the approximations with the help of the interpolation postprocessing technique. For the cubic domain and uniform partition, with the extrapolation, the accuracy of the mixed finite element approximations can be improved.
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页码：112 / 131
页数：20
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