Classification of Varieties with Canonical Curve Section via Gaussian maps on Canonical Curves

Details Classification of Varieties with Canonical Curve Section via Gaussian maps on Canonical Curves Classification of Varieties with Canonical Curve Section via Gaussian maps on Canonical Curves

1994-11-16

arxiv.org/abs/alg-geom/9411011v1

Mathematics

Algebraic Geometry

22 pages, fairly plain TeX

Scientific paper

Let $C \subset P^{g-1}$ be a smooth canonical curve of genus $g \geq 3$. The purpose of this article is to further develop a method to classify varieties having $C$ as their curve section, using Gaussian map computations. In a previous article a careful analysis of the degeneration to the cone over the hyperplane section was made for _prime_ Fano threefolds, that is Fano threefolds whose Picard group is generated by the hyperplane bundle. In this article we extend this method and classify Fano threefolds of higher index (which still have Picard number one). We are also able to classify Mukai varieties, i.e. varieties of dimension four or more with canonical curve sections.

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