An isoperimetric inequality for twisted eigenvalues with one orthogonality constraint

Emanuele Salato, Davide Zucco

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