TY - JOUR T1 - Theorem of Upper-lower Solutions for a Class of Nonlinear Degenerate Parabolic Systems Without Quasi-monotony AU - Bai Donghua, Liu Yi JO - Journal of Partial Differential Equations VL - 3 SP - 62 EP - 78 PY - 1989 DA - 1989/02 SN - 2 DO - http://doi.org/ UR - https://global-sci.org/intro/article_detail/jpde/5836.html KW - AB - In this paper we generalize the comparative method of solving some non-degenerate reaction-diffusion systems to a class of nonlinear degenerate parabolic systems without quasi-monotony, and obtain the relevant theorem of upper-lower solutions.