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7 papers

math.SP2026

On a shape optimisation problem for Maxwell's eigenvalues on cuboids

Pier Domenico Lamberti, Luigi Provenzano, Rebecca Sempio

The paper studies how to shape a rectangular box (cuboid) to minimize certain combinations of the first three Maxwell eigenvalues under fixed volume and perimeter, showing that the…

math.AP2026

Asymptotic behavior and spectral distortion for biharmonic Steklov problems on thin domains

Bauyrzhan Derbissaly, Pier Domenico Lamberti

In this paper, we investigate the asymptotic behavior of the eigenvalues and eigenfunctions of a biharmonic Steklov problem defined on a thin domain in the dimensional Euclidea…

math.AP2026

The nonlinear Steklov problem in outward cuspidal domains

Pier Domenico Lamberti, Alexander Ukhlov

In this article, we consider the nonlinear Steklov eigenvalue problem in outward cuspidal domains. Using the compactness of the weighted trace embedding we obtain the variational c…

math.AP2025

Steklov vs. Steklov: A Fourth-Order Affair Related to the Babuška Paradox

Francesco Ferraresso, Pier Domenico Lamberti

We discuss two fourth-order Steklov problems and highlight a BabuÅ¡ka paradox appearing in their approximations on convex domains via sequences of convex polygons. To do so, we pro…

math.AP2025

Shape sensitivity analysis of Neumann-Poincaré eigenvalues

Matteo Dalla Riva, Pier Domenico Lamberti, Paolo Luzzini +1

This paper concerns the eigenvalues of the Neumann-Poincaré operator, a boundary integral operator associated with the harmonic double-layer potential. Specifically, we examine ho…

math.AP2025

-regularity of Steklov eigenfunctions on convex domains via Rellich-Pohozaev identity

Pier Domenico Lamberti, Luigi Provenzano

We prove that the Steklov eigenfunctions on convex domains of are regular by adapting a classical argument combined with the Rellich-Pohozaev identity.