Journal of Convex Analysis 28 (2021), No. 1, 179--196
Copyright Heldermann Verlag 2021
Interior Regularity for a Class of Nonlinear Second-Order Elliptic Systems
Josef Danecek
VSB - Technical University of Ostrava, FEECS, Department of Applied Mathematics, 70833 Ostrava-Poruba, Czech Republic
danecek.j@seznam.cz
Jana Stará
Department of Mathematical Analysis, Faculty of Mathematics and Physics, Charles University, 18600 Praha 8, Czech Republic
stara@karlin.mff.cuni.cz
Eugen Viszus
Department of Mathematical Analysis and Numerical Mathematics, Faculty of Mathematics, Physics and Informatics, Comenius University, 84248 Bratislava, Slovak Republic
eugen.viszus@fmph.uniba.sk
The interior C1,γ-regularity is proved for weak solutions to a class of nonlinear second-order elliptic systems. It is typical for the system belonging to the class that the continuity moduli of the gradients of its coefficients become slow growing sufficiently far from zero. This property guarantees the regularity of the gradients of solutions to such system in a case when the ellipticity constant is big enough. Some characteristic features of the obtained result are illustrated by examples at the end of the paper.
Keywords: Nonlinear elliptic systems, weak solutions, regularity, Campanato spaces.
MSC: 35J47.
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