Lower semi-continuity for $\mathcal A$-quasiconvex functionals under convex restrictions
We show weak lower semi-continuity of functionals assuming the new notion of a ``convexly constrained'' $\mathcal A$-quasiconvex integrand. We assume $\mathcal A$-quasiconvexity only for functions defined on a set $K$ which is convex. Assuming this and sufficient integrability of the sequence we show that the functional is still (sequentially) weakly lower semi-continuous along weakly convergent ``convexly constrained'' $\mathcal A$-free sequences. In a motivating example, the integrand is $-\det^{\frac{1}{d-1}}$ and the convex constraint is positive semi-definiteness of a matrix field.
1992 ◽
Vol 203
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pp. 83-93
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2002 ◽
Vol 93
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pp. 247-263
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1979 ◽
Vol 20
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pp. 193-198
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2000 ◽
Vol 234
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pp. 109-133
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2018 ◽
Vol 11
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pp. 793-802
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