The Strong Maximum Principle and the Harnack inequality for a class of hypoelliptic divergence-form operators

Erika Battaglia, Stefano Biagi, Andrea Bonfiglioli

In this paper we consider a class of hypoelliptic second-order partial differential operators $\mathcal{L}$ in divergence form on ${\mathbb{R}}^N$, arising from CR geometry and Lie g…