Gradient regularity for double-phase orthotropic functionals

Stefano Almi, Chiara Leone, Gianluigi Manzo

We prove higher integrability for local minimizers of the double-phase orthotropic functional \[ \sum_{i=1}^{n}\int_Ω\left(\left|u_{x_i}\right|^p+a(x)\left| u_{x_i}\right|^q\right…