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Numerical approximation of planar oblique derivative problems in nondivergence form

Date: Thursday, July 19, 2018 16:00 - 18:00
Speaker: Dietmar Gallistl (University of Twente)
Location: Big Seminar room Ground floor / Office Bldg West (I21.EG.101)
Series: Formal Sciences Seminar
Host: Julian Fischer
Lab building west seminar room


A numerical method for approximating a uniformly elliptic oblique derivative problem in two-dimensional simply-connected domains is proposed. The numerical scheme employs a mixed formulation with piecewise affine functions on curved finite element domains. The direct approximation of the gradient of the solution turns the oblique derivative boundary condition into an oblique direction condition. A priori and a posteriori error estimates as well as numerical computations on uniform and adaptive meshes are provided.

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