Acta mathematica scientia,Series A ›› 2017, Vol. 37 ›› Issue (3): 457-468.

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A Truncation Method Based on Hermite Functions Expansion for a Cauchy Problem of the Laplace Equation

Xie Ou1, Meng Zehong2, Zhao Zhenyu1, You Lei1   

  1. 1. Faculty of Mathematics and Computer Science, Guangdong Ocean University, Guangdong Zhanjiang 524088;
    2 School of Mathematics and Statistics, Zhejiang University of Finance & Economics, Hangzhou 310018
  • Received:2016-09-27 Revised:2017-01-21 Online:2017-06-26 Published:2017-06-26
  • Supported by:
    Supported by the NSFC (11201085) and the Guandong Ocean University Innovation Strong School Projects (2014050216)

Abstract: We investigate a Cauchy problem for the Laplace equation in this paper. To obtain a stable numerical solution for this ill posed problem, we present a truncation method based on Hermite functions expansion. Error estimate are obtained together with a discrepancy principle for the regularization parameter. Some numerical tests show that the method works effectively.

Key words: Ill-posed problem, Cauchy problem for Laplace equation, Regularization, Discrepancy principle, Truncation method

CLC Number: 

  • O124
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