The Smoothness of Weak Solutions to the System of Second Order Differential Equations with Non-negative Characteristics  

作　　者：张克农 

机构地区：[1]Dept.of Math.Xiamen Univ.Xiamen,361005

出　　处：《Chinese Quarterly Journal of Mathematics》1993年第4期15-22,共8页数学季刊（英文版）

摘　　要：In this paper,we will discuss smoothness of weak solutions for the system of second order differential equations eith non-negative characteristies.First of all,we establish boundary,and interior estimates and then we prove that solutions of regularization problem satisfy Lipschitz condition.

关 键 词：diff equa with non-negative characteristics regularization weak solution boundary and interior estimate 

分 类 号：O175.23[理学—数学]