Base point free theorems--saturation, b-divisors, and canonical bundle formula--
arXiv:math/0508554
Abstract
We reformulate base point free theorems. Our formulation is flexible and has some important applications. One of the main purposes of this paper is to prove a generalization of the base point free theorem in Fukuda's paper: On numerically effective log canonical divisors.
27 pages; title changed, a completely revised and expanded version, v3: minor revision