2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/160101In this paper, we give a new upper bound of Barban-Davenport-Halberstam type for twins of $k-$free numbers in arithmetic progressions.49 pagesNumber Theory11N25On a variance for twins of $k-$free numbers in arithmetic progressionstext