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Relaxation of free-discontinuity energies with obstacles

Matteo FocardiMaria Stella Gelli — 2008

ESAIM: Control, Optimisation and Calculus of Variations

Given a Borel function defined on a bounded open set with Lipschitz boundary and ϕ L 1 ( Ω , n - 1 ) , we prove an explicit representation formula for the lower semicontinuous envelope of Mumford-Shah type functionals with the obstacle constraint u + ψ n - 1 a.e. on and the Dirichlet boundary condition u = ϕ on Ω .

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