Optimal design problems with fractional diffusions

In this article we study optimization problems ruled by $α$-fractional diffusion operators with volume constraints. By means of penalization techniques we prove existence of solutions. We also show that every solution is locally of class $C^{0,α}$ (optimal regularity), and that the free boundary is a $C^{1,γ}$ surface, up to a $\mathcal{H}^{n-1}$-negligible set.

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