An isoperimetric inequality for twisted eigenvalues with one orthogonality constraint

Emanuele Salato, Davide Zucco

We consider twisted eigenvalues ${\lambda }_1^g(\Omega )$, defined as the minimum of the Rayleigh quotient of functions in $H_0^1(\Omega )$ that are orthogonal to a given function $g\in L^2_\text…