数苑藕舫论坛(2024年第74期):特邀湘潭大学黄云清教授作学术报告

发布单位:数学与统计学院(公共数学教学部)创建者:贾继红发布时间:2024-10-28浏览量:11

报告题目:On the optimal order approximation of the partition of unity finite element method

报告人: 黄云清 教授

报告时间:20241029日(周二)上午10:00-11:00                                 

报告地点:藕舫楼 724

主持人:  刘文军 教授

报告摘要:In the partition of unity finite element method, the nodal basis of the standard linear Lagrange finite element is multiplied by the Pk polynomial basis to form a local basis of an extended finite element space. Such a space contains the P1 Lagrange element space, but is a proper subspace of the Pk+1 Lagrange element space on triangular or tetrahedral grids. It is believed that the approximation order of this extended finite element is k, in H1-norm, as it was proved in the first paper on the partition of unity, by Babuska and Melenk and this space does not even contain the C0-Pk space. In this talk, we show surprisingly the approximation order is k + 1 in H1-norm. In addition, we extend the method to rectangular/cuboid grids and give a proof to this sharp convergence order. This is a joint work with Shangyou Zhang, University of Delaware.

报告人简介:黄云清,湘潭大学数学与计算科学学院教授,湖南国家应用数学中心主任,国家杰出青年基金获得者、国家首批百千万工程领军人才;兼任教育部高校数学类专业教指委副主任委员,中国数学会副理事长,中国工业与应用数学学会副理事长;SCI 期刊《Advances in Applied Mathematics and Mechanics》主编;获得国家自然科学二等奖、国家教学成果二等奖,教育部自然科学奖一等奖、“冯康科学计算奖”等科研奖励,受邀在2019年国际工业与应用数学大会上作大会邀请报告。

 

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数学与统计学院

江苏省应用数学(南京信息工程大学)中心

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20241028