Abstract
We prove an extension theorem for Sobolev functions which plays an important role in the partial regularity theory of vector valued functions which minimize degenerate variational integrals subject to some nonlinear side conditions in the image space.
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Fuchs, M. P-harmonic obstacle problems. Manuscripta Math 63, 381–419 (1989). https://doi.org/10.1007/BF01171756
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DOI: https://doi.org/10.1007/BF01171756