One base point free theorem for weak log Fano threefolds

Abstract

Let $(X,D)$ be log canonical pair such $\dim X=3$ and the divisor $-(K_X+D)$ is nef and big. For a special class of such $(X,D)$'s we prove that the linear system $|-n(K_X+D)|$ is free for $n\gg 0$.

8 pages; the main result was changed and the proof was corrected

References in corpus (1)

• Q-complements on log surfaces