Higher differentiability for a class of problems under p,q subquadratic growth

Elvira Mascolo, Antonia Passarelli di Napoli

We study the higher differentiability for nonlinear elliptic equation in divergence form $\mathcal{A}(x,Du)=b(x)$. The result covers the cases in which $\mathcal{A}(x,\xi )$ satisfie…