3 problems

Let $\Omega\subset\mathbb{R}^3$ be the cylindrical domain … where $\Omega_p\subset\mathbb{R}^2$ is a Lipschitz polygon. Suppose that each partition-of-unity function $\chi_\ell$ de…

Let $\sigma_T(\kappa,H,ell)>0$ be the parameter satisfying … Here $\sigma_T$ measures the quasi-orthogonality of $g$ on $Y$, and depends on the wavenumber through the wavenumber-depen…

Let $A$ be the discretized integral operator in the referenced two- or three-dimensional models, and let $T^{-1}_{\text{Schwarz}}$ be the Schwarz preconditioner associated with the…