Abstract
We consider the Dirichlet problem for the equation −∆u = λu + h(x)f(u), with h changing sign. In particular, we study existence of nontrivial solutions in the case where f has superlinear growth, but is not assumed to be odd. Two different approaches are used: one involving Morse theory and one using min-max methods.
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More From: Annales de l'Institut Henri Poincaré C, Analyse non linéaire
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