The asymptotic p-Poisson equation as p in Carnot-Caratheodory spaces

In this paper we study the asymptotic behavior of solutions to the subelliptic p-Poisson equation as p -> +infinity in Carnot-Caratheodory spaces. In particular, introducing a suitable notion of differentiability, extend the celebrated result of Bhattacharya et al. (Rend Sem Mat Univ Politec Torino Fascicolo Speciale 47:15-68, 1989) and we prove that limits of such solutions solve in the sense of viscosity a hybrid first and second order PDE involving the infinity-Laplacian and the Eikonal equation.