By using the fixed point theory and a new three-solution theorems, the existence of multiple solutions of the boundary value problem was obtained.
通过利用不动点指数理论及一个新的三解定理，得到了边值问题多个正解的存在性。
The existence of multiple solutions is obtained for Neumann problem of sublinear elliptic equations by the minimax methods in the critical point theory.
用临界点理论中的极小极大方法得到了次线性椭圆方程Neumann问题多重解的存在性。
By using critical point theory, we obtain some conditions for the existence of multiple solutions on boundary value problems of a discrete generalized Emden-Fowler equation.
应用临界点理论，获得了一类离散广义Emden - Fowler方程边值问题存在多个解的条件。
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