4 papers
A unified quantitative approach to Chiti and Kohler--Jobin inequalities
Vincenzo Amato, Luca Barbato, Emanuele Cristoforoni +4
We obtain two quantitative results related to classical rearrangement inequalities for the first Dirichlet eigenvalue. The first one is a quantitative version of Chiti's reverse Hö…
Symmetry-breaking and local stability of a two-phase eigenvalue problem in optimal insulation
Emanuele Cristoforoni, Federico Villone
We consider the first eigenvalue, , of a two-phase eigenvalue problem for the Laplacian with Robin boundary conditions, where the two phases are characterised by differen…
On some functionals involving torsional rigidity, principal eigenvalue and perimeter
Vincenzo Amato, Carlo Nitsch, Cristina Trombetti +1
In this paper we study some relationships between the first Dirichlet eigenvalue and the torsional rigidity of a domain . We consider the problem of optimizing the…
Remarks on the reinforcement of the spectrum of an elliptic problem with Robin boundary condition
Emanuele Cristoforoni, Federico Villone
We investigate the spectral properties of a differential elliptic operator on , where is a smooth domain surrounded by a layer . The thickness of the layer…