中文摘要：

研究一类次椭圆拟线性方程在具有Carnot-Caratheodory空间度量下的外区域的分析性质,得到了在各种情况下无界外区域上的Liouville型定理结论.

英文摘要：

In this paper,the analytic properties is considered for a class of subelliptic quasilinear equations in unbounded exterior domian.we establish various Liuoville theorems in unbounded exterior domain under the different settings with n≥3.