activity
20042026
most citedExtremal Eigenvalues of the Laplacian on Euclidean domains and closed surfaces

29 citations · 149 across the 40 of their papers we have counts for

collaborators

46 papers

math.DG2026

Lower bounds for the low Steklov eigenvalues

Tirumala Chakradhar, Bruno Colbois, Asma Hassannezhad

For a compact, connected, orientable Riemannian manifold with boundary components, we obtain geometric lower bounds for the low Steklov eigenvalues, namely , $1\le k\le b-…

math.SP2025

Upper bounds for the Steklov eigenvalues of warped products

Jade Brisson, Bruno Colbois, Alexandre Girouard +1

We obtain upper bounds for the Steklov eigenvalues of warped products , where is a compact Riemannian manifold with boundary and is a closed Riemannian manifold…

math.DG2025

Magnetic ground states and the conformal class of a surface

Bruno Colbois, Luigi Provenzano, Alessandro Savo

On a closed, orientable Riemannian surface of arbitrary genus and Riemannian metric we study the magnetic Laplacian with magnetic potential given by a harmonic…

math.SP2024

Upper bound for Steklov eigenvalues of warped products with fiber of dimension 2

Jade Brisson, Bruno Colbois

In this note, we investigate the Steklov spectrum of the warped product equipped with the metric , where is a compact surface. We find sharp u…

math.SP2024★ 1 cited

Spectral ratios and gaps for Steklov eigenvalues of balls with revolution-type metrics

Jade Brisson, Bruno Colbois, Katie Gittins

We investigate upper bounds for the spectral ratios and gaps for the Steklov eigenvalues of balls with revolution-type metrics. We do not impose conditions on the Ricci curvature o…

math.SP2024★ 8 cited

A reverse Faber-Krahn inequality for the magnetic Laplacian

Bruno Colbois, Corentin Léna, Luigi Provenzano +1

We consider the first eigenvalue of the magnetic Laplacian in a bounded and simply connected planar domain, with uniform magnetic field and Neumann boundary conditions. We investig…