2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/219799Let X be a K3 surface over a number field K. We prove that there exists a finite algebraic field extension L/K such that X has ordinary reduction at every non-archimedean place of L outside a density zero set of places.7 pagesAlgebraic GeometryNumber Theory14G25; 14J28; 11G25; 11G35text