2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/78109Let $X$ be a K3 surface defined over a number field $K$. Assume that $X$ admits a structure of an elliptic fibration or an infinite group of automorphisms. Then there exists a finite extension $K'/K$ such that the set of $K'$-rational points is Zariski dense in $X$.27 pages, LaTeXAlgebraic GeometryNumber Theorytext