Regularity results for some classes of higher order non linear elliptic systems.
Non linear systems of the type of the stationary Navier-Stokes system.
Graphs of finite mass which annot be approximated in area by smooth graphs.
The Dirichlet integral for mappings between manifolds: Cartesian currents and homology.
Cartesian currents and variational problems for mappings into spheres
Liquid crystals : relaxed energies, dipoles, singular lines and singular points
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