abstract: We will consider the shape optimization problem of minimizingmaximizing the first eigenvalue of the p-Laplace operator with Robin boundary conditions in the class of convex sets. In particular, when imposing a perimeter constraint, we will study the behavior of the eigenvalues as the boundary parameter beta varies in R. We prove an upper bound for the first Robin eigenvalue of the p- Laplacian with a positive boundary parameter and a quantitative version of the reverse Faber-Krahn type inequality for the first Robin eigenvalue of the p-Laplacian with negative boundary parameter, making use of a comparison argument obtained by means of inner parallel sets.
The results are contained in a joint work with V. Amato and A. Gentile.