Legendre spectral methods for the βgrad(
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E. Ahusborde; M. AzaΓ―ez; M.O. Deville; E.H. Mund
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Article
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2007
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Elsevier Science
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English
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This paper describes two Legendre spectral methods for the Γgrad(div) eigenvalue problem in R 2 . The first method uses a single grid resulting from the P N P N discretization in primal and dual variational formulations. As is well-known, this method is unstable and exhibits spectral 'pollution' eff