Adjoint pseudospectral least-squares methods for an elliptic boundary value problem

  • Authors:
  • Sang Dong Kim;Byeong-Chun Shin

  • Affiliations:
  • Department of Mathematics, Kyungpook National University, Daegu 702-701, Korea;Department of Mathematics, Chonnam National University, Gwangju 500-757, Korea

  • Venue:
  • Applied Numerical Mathematics
  • Year:
  • 2009

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Abstract

The adjoint approach for Legendre pseudospectral least-squares methods is presented by adopting the adjoint first-order systems developed in [Z. Cai, T. Manteuffel, S. McCormick, J. Ruge, First-order system LL^* (FOSLL*): scalar elliptic partial differential equations, SIAM J. Numer. Anal. 39 (2001) 1418-1445]. The discrete adjoint least-squares functional on a polynomial space using Legendre-Gauss-Lobatto points and weights is shown to be equivalent to H^1 norm. The spectral convergence is also provided with several numerical results.