2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/150860We continue the study of Hopf-Galois extensions with central invariants for a finite dimensional Hopf algebra. We concentrate on the geometrical side on the subject. We understand how to localize Hopf-Galois extensions and to paste them from local datum.24 pages, LATEX, with major revisionsQuantum Algebratext