969 resultados para Ordinary and partial differential equations
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In this paper we develop an adaptive procedure for the numerical solution of general, semilinear elliptic problems with possible singular perturbations. Our approach combines both prediction-type adaptive Newton methods and a linear adaptive finite element discretization (based on a robust a posteriori error analysis), thereby leading to a fully adaptive Newton–Galerkin scheme. Numerical experiments underline the robustness and reliability of the proposed approach for various examples
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Mode of access: Internet.
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"Only the material on elliptic equations will appear in these notes."
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Mimeographed.
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Supported in part by National Science Foundation under Grant No. U.S. NSF-GJ-328.
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Includes bibliographical references (20).
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Vita.
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Cover title.
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Bibliography: leaf [77]
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The paper has been presented at the 12th International Conference on Applications of Computer Algebra, Varna, Bulgaria, June, 2006
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In this paper are examined some classes of linear and non-linear analytical systems of partial differential equations. Compatibility conditions are found and if they are satisfied, the solutions are given as functional series in a neighborhood of a given point (x = 0).
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2002 Mathematics Subject Classification: 35S05
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2002 Mathematics Subject Classification: 35S05
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We develop the a posteriori error estimation of interior penalty discontinuous Galerkin discretizations for H(curl)-elliptic problems that arise in eddy current models. Computable upper and lower bounds on the error measured in terms of a natural (mesh-dependent) energy norm are derived. The proposed a posteriori error estimator is validated by numerical experiments, illustrating its reliability and efficiency for a range of test problems.