2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/129571We derive a two-terms asymptotics for eigenvalues of the Dirichlet Laplacian in a narrow strip of variable width. The asymptotics is taken with respect to a small paprameter that characterizes the width of the strip.17 pagesSpectral Theory35P15On the Spectrum of the Dirichlet Laplacian in a Narrow Striptext