2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/156014We review some recent results on the modularity of non-rigid Calabi-Yau threefolds.Accepted for publication in Proceedings of the BIRS Workshop on Modular Forms and String DualityAlgebraic GeometryNumber Theory11F23, 11G40, 14J32, 14G10text