REGULARITY AT THE BOUNDARY FOR SOLUTIONS OF NONLINEAR SUBELLIPTIC EQUATIONS

In this article we establish an estimate, in terms of subelliptic p-ca pacity, for the modulus of continuity at the boundary of the solution to the Dirichlet problem associated to a class of subelliptic quasilin ear equations. We infer from it the sufficiency part of a Wiener type criterion for the regularity of boundary points.