2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/66429We study invariants of Calabi-Yau varieties in positive characteristic, especially the height of the Artin-Mazur formal group. We illustrate these results by Calabi-Yau varieties of Fermat and Kummer type.Latex, 15 pagesAlgebraic Geometry14K10text