A generic property for the eigenfunctions of the Laplacian

Abstract

In this work we show that, generically in the set of $\mathcal{C}^2$ bounded regions of $\mathbb R^n$, $n \geq 2$, the inequality $ \int_{\Omega} \phi^3 \neq 0$ holds for any eigenfunction of the Laplacian with either Dirichlet or Neumann boundary conditions.