Abstract
We reformulate basepoint-free theorems using notions introduced by Shokurov, such as b-divisors and saturation of linear systems. Our formulation is flexible and has some important applications. One of the main purposes of this paper is to prove a generalization of the basepoint-free theorem in Fukuda’s paper “On numerically effective log canonical divisors”.
Citation
Osamu Fujino. "Basepoint-free theorems: saturation, b-divisors, and canonical bundle formula." Algebra Number Theory 6 (4) 797 - 823, 2012. https://doi.org/10.2140/ant.2012.6.797
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