常見(jiàn)例句Using the method of supersolution and subsolution and the theory of topology degree,we obtain some existence results of positive solution. 利用拓?fù)涠壤碚摵蜕?、下解方?得到了幾個(gè)正解的存在性定理.The Existence of the Supersolution and Subsolution of the Neumann Problems of the Fully Nonlinear Monotone Second-order Elliptic Systems 完全非線性單調(diào)二堦橢圓方程組Neumann問(wèn)題上解和下解的存在性supersolution (subsolution) 上（下）解supersolution(subsolution) 上（下）解 返回 subsolution