2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/113812Let $X$ be a projective normal surface over a number field $K$. Let $H$ be the sum of four properly intersecting ample effective divisors on $X$. We show that any set of $S$-integral points in $X-H$ is not Zariski dense.Number Theory11G35 ; 14 G05 ; 14G25text