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文章基本信息

  • 标题:Superconvergence of a finite element method for linear integro-differential problems
  • 本地全文:下载
  • 作者:Do Y. Kwak ; Sungyun Lee ; Qian Li
  • 期刊名称:International Journal of Mathematics and Mathematical Sciences
  • 印刷版ISSN:0161-1712
  • 电子版ISSN:1687-0425
  • 出版年度:2000
  • 卷号:23
  • 期号:5
  • 页码:343-359
  • DOI:10.1155/S0161171200001940
  • 出版社:Hindawi Publishing Corporation
  • 摘要:

    We introduce a new way of approximating initial condition to the semidiscrete finite element method for integro-differential equations using any degree of elements. We obtain several superconvergence results for the error between the approximate solution and the Ritz-Volterra projection of the exact solution. For 1$"> k > 1 , we obtain first order gain in L p ( 2 ≤ p ≤ ∞ ) norm, second order in W 1 , p ( 2 ≤ p ≤ ∞ ) norm and almost second order in W 1 , ∞ norm. For k = 1 , we obtain first order gain in W 1 , p ( 2 ≤ p ≤ ∞ ) norms. Further, applying interpolated postprocessing technique to the approximate solution, we get one order global superconvergence between the exact solution and the interpolation of the approximate solution in the L p and W 1 , p ( 2 ≤ p ≤ ∞ ) .

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