The spectrum of the Steklov-Helmholtz operator

Nilima Nigam, Kshitij Patil, Weiran Sun

We present a wavenumber-robust strategy for computing Steklov eigenpairs of the Helmholtz operator $-\hat{I}”-\hat{I}{¼}^2$. As the wavenumber $\hat{I}¼\to \hat{I}{¼}_D$ from below (where $\hat{I}{¼}_D^2$ is…