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New anisotropic a priori error estimates

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Summary.

We prove a priori anisotropic estimates for the \(L^2\) and \(H^1\) interpolation error on linear finite elements. The full information about the mapping from a reference element is employed to separate the contribution to the elemental error coming from different directions. This new \(H^1\) error estimate does not require the “maximal angle condition”. The analysis has been carried out for the 2D case, but may be extended to three dimensions. Numerical experiments have been carried out to test our theoretical results.

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Authors and Affiliations

  1. Département de Mathématiques, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland; e-mail: {luca.formaggia, simona.perotto}@epfl.ch , , , , , , CH

    L. Formaggia & S. Perotto

Authors
  1. L. Formaggia
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  2. S. Perotto
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Additional information

Received March 3, 2000 / Revised version received June 27, 2000 / Published online April 5, 2001

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Formaggia, L., Perotto, S. New anisotropic a priori error estimates. Numer. Math. 89, 641–667 (2001). https://doi.org/10.1007/s002110100273

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  • DOI: https://doi.org/10.1007/s002110100273