Explicit formulas of strict BV relaxed energies for polyconvex functionals with linear growth
Domanico Mucci, Riccardo Scala
Abstract
We consider polyconvex functionals defined on vector valued functions, the model case being the graph area functional, and we analyze the relaxed energy with respect to the strict convergence in BV. In several cases where the relaxed area is known, by exploiting a continuity result by Reshetnyak we are able to find an explicit formula for wide classes of integrands with linear growth in the minors of the gradient. We preliminarily extend to the BV setting a continuity property observed by Acerbi--Dal Maso in the Sobolev case. Finally, partial results concerning the relaxation of the vortex map with respect to the L1 convergence are obtained.
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