机译:有界Quasilinearity的Quasilinear方程的多种符号改变解决方案
LMAM School of Mathematical Science Peking University Beijing 100871 China;
Department of Mathematics Yunnan Normal University Kunming Yunnan 650500 China;
College of Mathematics and Informatics and Center for Applied Mathematics of Fujian Province (FJNU) Fujian Normal University Fuzhou Fujian 350117 China;
Department of Mathematics and Statistics Utah State University Logan UT 84322 USA;