The nonlinear membrane energy : variational derivation under the constraint $\det \nabla u > 0$
Résumé
In [Anza Hafsa, O., Mandallena, J.-P., The nonlinear membrane energy: variational derivation under the constraint "detbackward differenceu≠0", J. Math. Pures Appl. 86 (2006) 100-115] we gave a variational definition of the nonlinear membrane energy under the constraint "detbackward differenceu≠0". In this paper we obtain the nonlinear membrane energy under the more realistic constraint "detbackward differenceu>0".