On the Log Discrepancies in Toric Mori Contractions
arXiv:1208.3271
Abstract
It was conjectured by McKernan and Shokurov that for all Mori contractions from X to Y of given dimensions, for any positive epsilon there is a positive delta, such that if X is epsilon-log terminal, then Y is delta-log terminal. We prove this conjecture in the toric case and discuss the dependence of delta on epsilon, which seems mysterious.
8 pages, no figures. 2nd version: some typos corrected