张海亮, 张武. New Advances of Maximum Principles for a Class of Nonlinear Elliptic Equations[J]. 2003, (5): 330-331.DOI:
一类非线性椭圆型方程极值原理的新进展
摘要
引入一些新的方法和技巧
应用Hopf极大值原理
得到了非分离形的非线性散度形椭圆方程解的某含梯度函数满足极大值原理的条件
较满意地解决了P.W.Schaefer20多年前提出的公开问题.
Abstract
By introducing some new methods and skills
the Hopf′s maximum principle is utilized to obtain maximum principles for functions which are defined on solutions of some nonlinear elliptic equations in divergence form. The results have solved an open problem posed by P.W. Schaefer twenty years ago.