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作者:

Cui, Ming (Cui, Ming.) | Ye, Xiu (Ye, Xiu.) | Zhang, Shangyou (Zhang, Shangyou.)

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摘要:

A modified weak Galerkin (MWG) finite element method is developed for solving the biharmonic equation. This method uses the same finite element space as that of the discontinuous Galerkin method, the space of discontinuous polynomials on polytopal meshes. But its formulation is simple, symmetric, positive definite, and parameter independent, without any of six inter-element face-integral terms in the formulation of the discontinuous Galerkin method. Optimal order error estimates in a discrete H2 norm are established for the corresponding finite element solutions. Error estimates in the L2 norm are also derived with a sub-optimal order of convergence for the lowest-order element and an optimal order of convergence for all high-order of elements. The numerical results are presented to confirm the theory of convergence. © 2020, Shanghai University.

关键词:

Finite element method Galerkin methods

作者机构:

  • [ 1 ] [Cui, Ming]College of Applied Science, Beijing University of Technology, Beijing, China
  • [ 2 ] [Ye, Xiu]Department of Mathematics, University of Arkansas at Little Rock, Little Rock; AR; 72204, United States
  • [ 3 ] [Zhang, Shangyou]Department of Mathematical Sciences, University of Delaware, Newark; DE; 19716, United States

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来源 :

Communications on Applied Mathematics and Computation

ISSN: 2096-6385

年份: 2021

期: 1

卷: 3

页码: 91-105

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