【摘要】 <正> §1.主要结果与辅助引理本文考虑如下的二阶椭园型非线性方程组divAⁱ（x,u,Du）=0,i=1,2,…,N （1.1） 设ΩRⁿ是一个有界开区域,函数u∈H₂¹,loc（Ω,Rⁿ）称为方程组（1.1）在Ω上的一个弱解,如果它满足（见[3]）更多还原

【Abstract】 In paper [1], M. Meier obtained some houndedness and integrability results for nonlinear elliptic systems which generalized the results given by J. Serrin in [2]. In this paper, We discuss the Harnack type inequalities for a simpler, nonlinear elliptic systems of second order using a similar menhod as in [1], Under some suitable supposition. We have obtained the result‖u‖≤(infu + k).更多还原