Sign-changing Solutions for Fourth Order Elliptic Equation with Concave-convex Nonlinearities
DOI:
https://doi.org/10.15377/2409-5761.2024.11.1Keywords:
Sign-changing solutions, Fourth order elliptic equation, Constraint variational method, Concave-convex nonlinearities, Quantitative deformation lemmaAbstract
In this paper, we study the following fourth order elliptic equation:
Δ²u - Δu + V(x)u = κ(x)|u|q-2u + |u|p-2u in RN,
where Δ² := Δ(Δ) is the biharmonic operator, 4 > N, 1 < q < 2 < p < 2* := 2N / (N - 4). Assuming that V(x) satisfies a class of coercive conditions and the nonnegative weighted function κ(x) belongs to Lp / (p-q)(RN), we obtain the existence of one sign-changing solution with the help of constraint variational method and quantitative deformation lemma.
The novelty of this paper is that when the nonlinearity is the combination of concave and convex functions, we are able to obtain the existence of sign-changing solutions. Some recent results are improved and generalized significantly.
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