2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/224897The interpolation of couples of separable Hilbert spaces with a function parameter is studied. The main properties of the classic interpolation are proved. Some applications to the interpolation of isotropic Hörmander spaces over a closed manifold are given.Analysis of PDEs46B70, 46E35text