Abstract
It is shown that the solution of the biharmonic variational inequality has bounded second derivatives provided that the obstacle and the data are smooth.
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During the preparation of a portion of the paper, the author was a guest of the Scuola Normale Superiore in Pisa, supported by the German Research Association (DFG).
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Frehse, J. On the regularity of the solution of the biharmonic variational inequality. Manuscripta Math 9, 91–103 (1973). https://doi.org/10.1007/BF01320669
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DOI: https://doi.org/10.1007/BF01320669