arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1610.04450math.NAcs.NA
收藏

二次拉格朗日插值常数在三角有限元上的显式界

Explicit Bound for Quadratic Lagrange Interpolation Constant on Triangular Finite Elements

Graduate School of Science and Technology, Niigata University(新潟大学科学技术研究生院);LSEC, ICMSEC, Academy of Mathematics and Systems Science, Chinese Academy of Sciences(中国科学院数学与系统科学研究院 LSEC、ICMSEC)

Xuefeng Liu, Chun'guang You

AI总结:

本文提出算法以提供二次拉格朗日插值误差常数的显式界,通过求解特征值问题得到上界,并利用瑞利-里兹方法获得下界,通过数值计算验证不同形状三角形上的界有效性。

摘要:

对于二次拉格朗日插值函数,提出一种算法以提供出现在插值误差估计中的插值误差常数的显式和验证界。通过求解特征值问题获得插值常数的上界,并通过显式下界获得其特征值的下界。插值常数的下界可通过应用瑞利-里兹方法轻松获得。通过数值计算演示了不同形状三角形上插值常数的上界和下界的有效性。一个在线计算演示可在http://www.xfliu.org/onlinelab/上访问。

英文摘要:

For the quadratic Lagrange interpolation function, an algorithm is proposed to provide explicit and verified bound for the interpolation error constant that appears in the interpolation error estimation. The upper bound for the interpolation constant is obtained by solving an eigenvalue problem along with explicit lower bound for its eigenvalues. The lower bound for interpolation constant can be easily obtained by applying the Rayleigh-Ritz method. Numerical computation is performed to demonstrate the sharpness of lower and upper bounds of the interpolation constants over triangles of different shapes. An online computing demo is available at http://www.xfliu.org/onlinelab/.

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。

↑