Some existence theorems for semilinear Neumann problems with Landesman-Lazer condition revisited

Sheng Ma, Zhihua Hu, Jing Jin, Qin Jiang


In this paper, existence theorems are established for Neumann problems for semilinear elliptic equations at resonance together with Landesman-Lazer condition revisited. Our existence results follow as an application of the Saddle point Theorem together with a standard eigenspace decomposition.


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