Minimal classes on the intermediate Jacobian of a generic cubic threefold

Details Minimal classes on the intermediate Jacobian of a generic cubic threefold Minimal classes on the intermediate Jacobian of a generic cubic threefold

2008-02-07

arxiv.org/abs/0802.0978v1

Mathematics

Algebraic Geometry

14 pages

Scientific paper

Let X be a smooth cubic threefold. We can associate two objects to X: the intermediate Jacobian J and the Fano surface F parametrising lines on X. By a theorem of Clemens and Griffiths, the Fano surface can be embedded in the intermediate Jacobian and the cohomology class of its image is minimal. In this paper we show that if X is generic, the Fano surface is the only surface of minimal class in J.

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