闸函数 meaning in English

barrier function

In chapter 3 , we constitute the barriers related to la and get the entire positive solution of the yamabe type equation on la when a = 1 . chapter 4 is devoted to the uniqueness proof of p - subelliptic operator
在第三章，构造了相应于l _ a的闸函数，并得到了a = 1时，与l _ a相应的yamabe型方程的整体正解。
This paper uses compare principle to show that there exists at most one of classical solution for ( 1 ) , while the existance of solution is obtained through continuous method . to get the required a priori estimates except the double normal derivatives , we adopt the method in [ 3 ] , and the double normal derivatives on dq are achieved by barrier constructions and applying skill of [ 2 ]
本文用比较原理证明了问题( 1 )至多存在一个古典解，应用连续性方法，得到了问题( 1 )古典解的存在。在得到所需的先验估计时，利用了[ 3 ]中的方法建立了除去边界二阶法向导数外的先验估计，通过构造闸函数，用[ 2 ]中的技巧得到在边界(