Acta mathematica scientia,Series A ›› 2023, Vol. 43 ›› Issue (3): 883-895.

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A Kind of Numerical Algorithm for Elliptic Interface Problem

Yu Yikang,Niu Jing*()   

  1. School of Mathematics and Sciences, Harbin Normal University, Harbin 150025
  • Received:2022-11-16 Revised:2023-01-12 Online:2023-06-26 Published:2023-06-01
  • Contact: Jing Niu E-mail:qq63192678@126.com
  • Supported by:
    Youth Fund of NSFC(12101164);Postgraduate Innovative Scientific Research Project of Harbin Normal University(HSDSSCX2022-40)

Abstract:

In this paper, a numerical algorithm based on the theory of reproducing kernel space is proposed for the one-dimensional ellipse interface problem. This method integrates the reproducing kernel function of ${W}^{1}_{2}$ space to obtain a set of new basis in the cubic spline space, on which a broken cubic spline space is established. Then we use the least squares method to get the approximate solution of this kind of interface problem. We discussed the order of convergence under the $H_2$ norm, $H_1$ norm and $L_2$ norm. Finally, our theory is verified by several numerical example.

Key words: Interface problem, Reproducing kernel, The cubic spline space, The least squares method, Convergence analysis

CLC Number: 

  • O241.8
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