Positive and sign-changing solutions for Kirchhoff equations with indefinite potential

Yan-Fei Yang , Chun-Lei Tang

Communications in Analysis and Mechanics ›› 2025, Vol. 17 ›› Issue (1) : 159 -187.

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Communications in Analysis and Mechanics ›› 2025, Vol. 17 ›› Issue (1) :159 -187. DOI: 10.3934/cam.2025008
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Positive and sign-changing solutions for Kirchhoff equations with indefinite potential
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Abstract

We deal with the nonlinear Kirchhoff problem −(a + b ∫R3 |∇u|2dx) Δu + V(x)u = f(u), x ∈ R3, (P) where a is a positive constant, b > 0 is a parameter, the potential function V is allowed to change its sign, and the nonlinearity f ∈ C(R, R) exhibits subcritical growth. Under some suitable conditions on V, we first prove that the problem has a positive ground state solution for all b > 0. Then, by using a more general global compactness lemma and a sign-changing Nehari manifold, combined with the method of constructing a sign-changing (PS)c sequence, we show the existence of a least energy sign-changing solution for b > 0 that is sufficiently small. Moreover, the asymptotic behavior b ↘ 0 is established.

Keywords

Kirchhoff problem / positive solutions / sign-changing solutions / variational methods / indefinite potential

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Yan-Fei Yang, Chun-Lei Tang. Positive and sign-changing solutions for Kirchhoff equations with indefinite potential. Communications in Analysis and Mechanics, 2025, 17 (1) : 159-187 DOI:10.3934/cam.2025008

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