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arxiv: 1207.4046 · v1 · pith:NYGJM3R7new · submitted 2012-07-17 · 🧮 math.AG

Fano manifolds of index n-1 and the cone conjecture

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keywords coneconjecturedimensionaleffectivefanogammagroupindex
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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 $(X, \Delta)$ have finite, rational polyhedral fundamental domains. Let $Z$ be an $n$-dimensional Fano manifold of index $n-1$ such that $-K_Z = (n-1) H$ for an ample divisor $H$. Let $\Gamma$ be the base locus of a general $(n-1)$-dimensional linear system $V \subset |H|$. In this paper, we verify the Morrison-Kawamata cone conjecture for the blow-up of $Z$ along $\Gamma$.

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