CALCOLO

, Volume 41, Issue 2, pp 89–113

The inf-sup condition for low order elements on anisotropic meshes

Authors

  • T. Apel
    • Institut für Mathematik und Bauinformatik, Universität der Bundeswehr München, Neubiberg
  • S. Nicaise
    • Université de Valenciennes et du Hainaut Cambrésis, Institut des Sciences et Techniques de Valenciennes, Valenciennes
Article

DOI: 10.1007/s10092-004-0086-5

Cite this article as:
Apel, T. & Nicaise, S. Calcolo (2004) 41: 89. doi:10.1007/s10092-004-0086-5
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Abstract

On a large class of two-dimensional anisotropic meshes, the inf-sup condition (stability) is proved for the triangular and quadrilateral finite element pairs suggested by Bernardi/Raugel and Fortin. As a consequence the pairs \({\cal P}_2-{\cal P}_0\), \({\cal Q}_2-{\cal P}_0\), and \({\cal Q}_2^\prime-{\cal P}_0\) turn out to be stable independent of the aspect ratio of the elements.

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© Springer-Verlag 2004