Comparison Principles for Some Fully Nonlinear Sub-Elliptic Equations on the Heisenberg Group

Abstract

In this paper, we prove a form of the strong comparison principle for a class of fully nonlinear subelliptic operators of the form $\nabla^2_{H,s}\psi + L(\cdot,\psi,\nabla_{H}\psi)$ on the Heisenberg group, which include the CR invariant operators.