Spectral problems in boundary value problems constitute a fundamental area of applied mathematics and mathematical physics, where the focus lies on determining eigenvalues and corresponding ...

Elliptic equations represent a fundamental class of partial differential equations that arise in numerous models of steady-state processes, ranging from heat conduction to elasticity. Their study ...

The Boutet de Monvel calculus of pseudo-differential boundary operators is generalised to the scales of Besov and Triebel-Lizorkin spaces, ${\mathrm{B}}_{\mathrm{p ...