2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/78188Let $(X,Δ)$ be a proper dlt pair and $L$ a nef Cartier divisor such that $aL-(K_X+Δ)$ is nef and log big on $(X,Δ)$ for some $a\in {\mathbb Z}_{>0}$. Then $|mL|$ is base point free for every $m\gg 0$.4 pagesAlgebraic Geometrytext