Abstract
In this paper, we investigate the existence of least energy sign-changing solutions for the Kirchhoff-type problem −a+b∫R3|∇u|2dxΔu+V(x)u=f(u),x∈R3, where a, b > 0 are parameters, V∈C(R3,R), and f∈C(R,R). Under weaker assumptions on V and f, by using variational methods with the aid of a new version of global compactness lemma, we prove that this problem has a least energy sign-changing solution with exactly two nodal domains, and its energy is strictly larger than twice that of least energy solutions.
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