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In this paper, we consider the following Kirchhoff problem − a + b ∫ R 3 ∇ u 2 d x Δ u + λ V x u = u p − 2 u , in R 3 u ∈ H 1 R 3 where a , b > 0 are constants, λ is a positive parameter, and 4 < p < 6 . Under suitable assumptions on V x , the existence of nontrivial solution is obtained via variational methods. The potential V x is allowed to be sign-changing.
In this paper, we consider the following Kirchhoff problem − a + b ∫ R 3 ∇ u 2 d x Δ u + λ V x u = u p − 2 u , in R 3 u ∈ H 1 R 3 where a , b > 0 are constants, λ is a positive parameter, and 4 < p < 6 . Under suitable assumptions on V x , the existence of nontrivial solution is obtained via variational methods. The potential V x is allowed to be sign-changing.
𝛼 2 u| 2 )dxwhere a, b, 𝜆 > 0 are parameters, 𝜇 > 0, and 0Under some simple assumptions on V, g, and f , we prove that problem (1.1) has at least two nontrivial solutions. Moreover, the phenomenon of concentration of solutions is obtained.
We investigate a class of Kirchhoff type equations involving a combination of linear and superlinear terms as follows:When N = 3 and 4 < p < 6, for each a > 0 and µ sufficiently large, we obtain that at least one positive solution exists for 0 < λ ≤ λ 1 (f Ω ) while at least two positive solutions exist for λ 1 (f Ω ) < λ < λ 1 (f Ω ) + δ a without any assumption on the integral Ω g(x)φ p 1 dx, where λ 1 (f Ω ) > 0 is the principal eigenvalue of −∆ in H 1 0 (Ω) with weight function f Ω := f | Ω , and φ 1 > 0 is the corresponding principal eigenfunction. When N ≥ 3 and 2 < p < min{4, 2 * }, for µ sufficiently large, we conclude that (i) at least two positive solutions exist for a > 0 small and 0 < λ < λ 1 (f Ω ); (ii) under the classical assumption Ω g(x)φ p 1 dx < 0, at least three positive solutions exist for a > 0 small and λ 1 (f Ω ) ≤ λ < λ 1 (f Ω ) + δ a ; (iii) under the assumption Ω g(x)φ p 1 dx > 0, at least two positive solutions exist for a > a 0 (p) and λ + a < λ < λ 1 (f Ω ) for some a 0 (p) > 0 and λ + a ≥ 0.
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