Abstract
We show the existence of nodal solutions of the second-order nonlinear boundary value problem
where λ > 0 is a parameter, p : [0, 1]×ℝ2 → ℝ and g : ℝ →ℝ are continuous functions, and g(0) = 0. For a nonnegative integer k, we say that a solution is nodal if it has only simple zeros in (0, 1) and has exactly k-1 such zeros. Under some suitable conditions, we obtain that there exists λ∗ > 0 (or λ∗ > 0) such that for fixed k ∈ {1, 2,…}, problem (P) has at least one nodal solution for λ ∈ (k2π2/g∞, λ∗) (or λ ∈ (λ∗, k2π2/g∞)), where g∞ = lim|s|→∞ g(s)/s. The proof of our main results relies on the bifurcation technique.
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This work was supported by National Natural Science Foundation of China (Nos. 12061064, 12361040) and Shaanxi Fundamental Science Research Project for Mathematics and Physics (No. 22JSY018).
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Zhang, Y., Ma, R. Nodal solutions for some semipositone problemsvia bifurcation theory. Lith Math J 64, 115–124 (2024). https://doi.org/10.1007/s10986-024-09625-3
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DOI: https://doi.org/10.1007/s10986-024-09625-3