Geodesic
Error estimates for obstacle problems Of higher order
Zapiski Nauchnykh Seminarov POMI, Boundary-value problems of mathematical physics and related problems of function theory. Part 38, Tome 348 (2007), pp. 5-18 
M. Bildhauer; M. Fuchs. Error estimates for obstacle problems Of higher order. Zapiski Nauchnykh Seminarov POMI, Boundary-value problems of mathematical physics and related problems of function theory. Part 38, Tome 348 (2007), pp. 5-18. http://geodesic.mathdoc.fr/item/ZNSL_2007_348_a0/
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Voir la notice du chapitre de livre provenant de la source Math-Net.Ru

For obstacle problems of higher order involving power growth functionals we prove a posteriori error estimates using methods from duality theory. These estimates can be seen as a reliable measure for the deviation of an approximation from the exact solution being independent of the concrete numerical scheme under consideration.

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