Fano manifolds of index n-1 and the cone conjecture

preprint2012arXivOpen access

Abstract

The Morrison-Kawamata cone conjecture predicts that the actions of the automorphism group on the effective nef cone and the pseudo-automorphism group on the effective movable cone of a klt Calabi-Yau pair (X,Δ)(X, Δ) have finite, rational polyhedral fundamental domains. Let ZZ be an nn-dimensional Fano manifold of index n−1n-1 such that −KZ=(n−1)H-K_Z = (n-1) H for an ample divisor HH. Let ΓΓ be the base locus of a general (n−1)(n-1)-dimensional linear system V⊂∣H∣V \subset |H|. In this paper, we verify the Morrison-Kawamata cone conjecture for the blow-up of ZZ along ΓΓ.

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