二步幂零李群上—类左不变微分算子亚椭圆的充要条件

A SUFFICIENT AND NECESSARY CONDITION FOR HYPOELLIPTICITY OF A CLASS OF LEFT INVARIANT DIFFERENTIAL OPERATORS ON TWO STEP STRATIFIED NILPOTENT LIE GROUP

本文我们用幂零李群表示的方法，给出了二步幂零李群上一类左不变微分算子是亚椭圆的充要条件．

In this paper, We obtain a sufficient and necessary condition for subellipticity of a classes of left invariant differential operators on two stratified steps nilpotent Lie groups by the method of representative theory method of nilpotent Lie groups.