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 ...

Fourth-order boundary value problems (BVPs) constitute an essential class of differential equations where the highest derivative is of fourth order. These equations arise naturally in the mathematical ...

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 ...