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Robust Localization of the Best Error with Finite Elements in the Reaction-Diffusion Norm (1402.3959v1)

Published 17 Feb 2014 in math.NA

Abstract: We consider the approximation in the reaction-diffusion norm with continuous finite elements and prove that the best error is equivalent to a sum of the local best errors on pairs of elements. The equivalence constants do not depend on the ratio of diffusion to reaction. As application, we derive local error functionals that ensure robust performance of adaptive tree approximation in the reaction-diffusion norm.

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