Relaxation of signed integral functionals in BV |
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Authors: | Jan Kristensen Filip Rindler |
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Institution: | 1. Mathematical Institute, University of Oxford, 24–29 St Giles’, Oxford, OX1 3LB, UK
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Abstract: | For integral functionals initially defined for ${u \in {\rm W}^{1,1}(\Omega; \mathbb{R}^m)}$ by $$\int_{\Omega} f(\nabla u) \, {\rm d}x$$ we establish strict continuity and relaxation results in ${{\rm BV}(\Omega; \mathbb{R}^m)}$ . The results cover the case of signed continuous integrands ${f : \mathbb{R}^{m \times d} \to \mathbb{R}}$ of linear growth at infinity. In particular, it is not excluded that the integrands are unbounded below. |
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