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- Publisher
- Springer Journals
- Copyright
- Copyright © 2008 by Springer Science+Business Media, LLC
- Subject
- Mathematics; Numerical and Computational Methods ; Mathematical Methods in Physics; Mathematical and Computational Physics; Systems Theory, Control; Calculus of Variations and Optimal Control; Optimization
- ISSN
- 0095-4616
- eISSN
- 1432-0606
- DOI
- 10.1007/s00245-007-9033-6
- Publisher site
- See Article on Publisher Site
Abstract
We study the weak* lower semicontinuity properties of functionals of the form $$F(u)=\mathop{\mathrm{ess\,sup}}_{x\in\Omega}f(x,Du(x))$$ where Ω is a bounded open set of R N and u ∈ W 1,∞ (Ω). Without a continuity assumption on f (⋅, ξ ) we show that the supremal functional F is weakly * lower semicontinuous if and only if it is a level convex functional (i.e. it has convex sub-levels). In particular if F is weakly * lower semicontinuous, then it can be represented through a level convex function. Finally a counterexample shows that in general it is not possible to represent F through the level convex envelope of f .
Journal
Applied Mathematics and Optimization – Springer Journals
Published: Aug 1, 2008