Infinitely many solutions of superlinear elliptic equation (Q370202)

Summary: Via the Fountain theorem, we obtain the existence of infinitely many solutions of the following superlinear elliptic boundary value problem: \(-\Delta u = f(x, u)\) in \(\Omega\), \(u = 0\) on \(\partial\Omega\), where \(\Omega \subset \mathbb R^N (N > 2)\) is a bounded domain with smooth boundary and \(f\) is odd in \(u\) and continuous. There is no assumption near zero on the behavior of the nonlinearity \(f\), and \(f\) does not satisfy the Ambrosetti-Rabinowitz type technical condition near infinity.