A gradient recovery operator based on an oblique projection

Bishnu P. Lamichhane

Abstract

We present a construction of a gradient recovery operator based on an oblique projection, where the basis functions of two involved spaces satisfy a condition of biorthogonality. The biorthogonality condition guarantees that the recovery operator is local.

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Key words

gradient recovery, a posteriori error estimate, biorthogonal system

AMS subject classifications

65N30, 65N15, 65N50

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