M Caselli, A Gentile, R Giova - Journal of Differential Equations, 2020 - Elsevier
We establish the higher differentiability of solutions to a class of obstacle problems of the
type min{∫ Ω f (x, D v (x)) dx: v∈ K ψ (Ω)}, where ψ is a fixed function called obstacle, K ψ …