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Maximal regularity for parabolic equations with inhomogeneous boundary conditions in Sobolev spaces with mixed $L_p$-norm


Author: Peter Weidemaier
Journal: Electron. Res. Announc. Amer. Math. Soc. 8 (2002), 47-51
MSC (2000): Primary 35K20, 46E35; Secondary 26D99
DOI: https://doi.org/10.1090/S1079-6762-02-00104-X
Published electronically: December 19, 2002
MathSciNet review: 1945779
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Abstract: We determine the exact regularity of the trace of a function $u \in L_{q} (0,T; W_{p}^{2}(\Omega ))$ $\cap W^{1}_{q} (0,T; {L_{p} (\Omega ))}$ and of the trace of its spatial gradient on $\partial \Omega \times ( 0,T )$ in the regime $p \le q$. While for $p=q$ both the spatial and temporal regularity of the traces can be completely characterized by fractional order Sobolev-Slobodetskii spaces, for $p \neq q$ the Lizorkin-Triebel spaces turn out to be necessary for characterizing the sharp temporal regularity.


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Additional Information

Peter Weidemaier
Affiliation: Fraunhofer-Institut Kurzzeitdynamik, Eckerstr. 4, D-79104 Freiburg, Germany
Email: weide@emi.fhg.de

Keywords: Maximal regularity, inhomogeneous boundary conditions, trace theory, mixed norm, Lizorkin-Triebel spaces
Received by editor(s): October 16, 2002
Published electronically: December 19, 2002
Communicated by: Michael E. Taylor
Article copyright: © Copyright 2002 American Mathematical Society