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In this paper we study the existence of solution for the following class ofnonlocal problems \[ L_0u =f(x,u)+g(x) , \ \mbox{in} \ \Omega, \] where $\Omega\subset \mathbb{R}^{N}$, $N\geq 1$, is a bounded connected open, $g \inC(\overline{\Omega})$, $f:\overline{\Omega} \times \mathbb{R} \to \mathbb{R}$are function, and $L_0 : C(\overline{\Omega}) \to C(\overline{\Omega})$ is anonlocal dispersal operator. Using a sub-supersolution method and the degreetheory for $\gamma$-Condensing maps, we have obtained a result of theAmbrosetti-Prodi type, that is, we obtain a necessary condition on $g$ for thenon-existence of solutions, the existence of at least one solution, and theexistence of at least two distinct solutions.

An Ambrosetti-Prodi type result for integral equations involving dispersal operator