Abstract
We consider a smooth, complete and non-compact Riemannian manifold \((\mathcal {M},g)\) of dimension \(d \ge 3\), and we look for solutions to the semilinear elliptic equation
The potential \(V :\mathcal {M} \rightarrow \mathbb {R}\) is a continuous function which is coercive in a suitable sense, while the nonlinearity f has a subcritical growth in the sense of Sobolev embeddings. By means of \(\nabla \)-theorems introduced by Marino and Saccon, we prove that at least three non-trivial solutions exist as soon as the parameter \(\lambda \) is sufficiently close to an eigenvalue of the operator \(-\varDelta _g\).
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Appolloni, L., Molica Bisci, G. & Secchi, S. Multiple solutions for Schrödinger equations on Riemannian manifolds via \(\nabla \)-theorems. Ann Glob Anal Geom 63, 11 (2023). https://doi.org/10.1007/s10455-023-09885-1
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DOI: https://doi.org/10.1007/s10455-023-09885-1