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arxiv: 1206.1994 · v2 · pith:NXRWTDNBnew · submitted 2012-06-10 · 🧮 math.AG

Simple normal crossing Fano varieties and log Fano manifolds

classification 🧮 math.AG
keywords fanocrossingmanifoldsnormalsimpleamplearticlecalled
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A projective log variety (X, D) is called "a log Fano manifold" if X is smooth and if D is a reduced simple normal crossing divisor on X with -(K_X+D) ample. The n-dimensional log Fano manifolds (X, D) with nonzero D are classified in this article when the log Fano index r of (X, D) satisfies either r\geq n/2 with \rho(X)\geq 2 or r\geq n-2. This result is a partial generalization of the classification of logarithmic Fano threefolds by Maeda.

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