Partial regularity for manifold constrained quasilinear elliptic systems

We consider manifold constrained weak solutions of quasilinear uniformly elliptic systems of divergence type with a source term that grows at most quadratically with respect to the gradient of the solution. As we impose that the solution lies on a Riemannian manifold, the classical smallness conditi...

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Bibliographic Details
Published in:Nonlinear analysis 2024-12, Vol.249, p.113643, Article 113643
Main Authors: Cabezas-Rivas, Esther, Moll, Salvador, Pallardó-Julià, Vicent
Format: Article
Language:English
Subjects:
Caccioppoli inequality
F-harmonic maps
Hölder continuity
Partial regularity
Riemannian manifold
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Summary:We consider manifold constrained weak solutions of quasilinear uniformly elliptic systems of divergence type with a source term that grows at most quadratically with respect to the gradient of the solution. As we impose that the solution lies on a Riemannian manifold, the classical smallness condition for regularity can be relaxed to an inequality relating strict convexity of the squared distance and growth of the leading order term in the tangent component of the source. As a key tool for the proof of a partial regularity result, we derive a fully intrinsic Caccioppoli inequality which may be of independent interest. Finally we show how the systems under consideration have a variational nature and arise in the context of F- or V-harmonic maps.
ISSN:0362-546X
DOI:10.1016/j.na.2024.113643