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Interpolation in Jacobi-weighted spaces and its application to a posteriori error estimations of the p-version of the finite element method
The goal of this work is to introduce a local and a global interpolator in
Jacobi-weighted spaces, with optimal order of approximation in the context of
the -version of finite element methods. Then, an a posteriori error
indicator of the residual type is proposed for a model problem in two
dimensions and, in the mathematical framework of the Jacobi-weighted spaces,
the equivalence between the estimator and the error is obtained on appropriate
weighted norm
Computer Algebra meets Finite Elements: an Efficient Implementation for Maxwell's Equations
We consider the numerical discretization of the time-domain Maxwell's
equations with an energy-conserving discontinuous Galerkin finite element
formulation. This particular formulation allows for higher order approximations
of the electric and magnetic field. Special emphasis is placed on an efficient
implementation which is achieved by taking advantage of recurrence properties
and the tensor-product structure of the chosen shape functions. These
recurrences have been derived symbolically with computer algebra methods
reminiscent of the holonomic systems approach.Comment: 16 pages, 1 figure, 1 table; Springer Wien, ISBN 978-3-7091-0793-
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