toroidal to lc MAY9KNFN

toroidal to lc

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Lemma 3.1. Let (X, ΣX ) and (Z, ΣZ) be toroidal pairs, let f : X → Z be a toroidal contraction and let F be the induced foliation. Let ∆ be the horizontal part of ΣX . Then (F , ∆) is log canonical. (pdf) (Ambro 等, 2022, p. 17)