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Adv. Appl. Math. Mech., 2 (2010), pp. 303-332. |
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A Family of Methods of the DG-Morley Type for Polyharmonic Equations Vitoriano Ruas 1*, Jos\'e Henrique Carneiro De Araujo 2 1 UPMC-Univ.Paris 6, UMR7190 Inst.Jean Le Rond d'Alembert CNRS, Paris, France, Visiting Professor at Graduate School of Computer Science, Universidade Federal Fluminense, Niter'oi, RJ, Brazil2 Department and Graduate School of Computer Science, Universidade Federal Fluminense, Niter'oi, RJ, Brazil Received 7 June 2009; Accepted (in revised version) 28 January 2010 doi: 10.4208/aamm.09-m0953 Abstract Discontinuous Galerkin methods as a solution technique of second order elliptic problems, have been increasingly exploited by several authors in the past ten years. It is generally claimed the alledged attractive geometrical flexibility of these methods, although they involve considerable increase of computational effort, as compared to continuous methods. This work is aimed at proposing a combination of DGM and non-conforming finite element methods to solve elliptic $m$-harmonic equations in a bounded domain of $\real^n$, for $n$ = 2 or $n$ = 3, with $m $$\geq$$ n+1$, as a valid and reasonable alternative to classical finite elements, or even to boundary element methods. AMS subject classifications: 65N30, 65N99, 76D07, 92C55Key words: Discontinuous Galerkin, finite elements, Hermite tetrahedrons, Morley triangle, non-conforming, polyharmonic equations. *Corresponding author. Email: vitoriano.ruas@upmc.fr (V. Ruas), jhca@ic.uff.br (J. H. Carneiro de Araujo) |