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arXiv · 1001.4853

The Fano surface of the Klein cubic threefold

Xavier Roulleau
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Abstract

We prove that the Klein cubic threefold $F$ is the only smooth cubic threefold which has an automorphism of order 11. We compute the period lattice of the intermediate Jacobian of $F$ and study its Fano surface $S$. We compute also the set of fibrations of $S$ onto a curve of positive genus and the intersection between the fibres of these fibrations. These fibres generate an index 2 sub-group of the Néron-Severi group and we obtain a set of generators of this group. The Néron-Severi group of $S$ has rank $25=h^{1,1}$ and discriminant $11^{10}$.

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Xavier Roulleau. 2010-01-27. The Fano surface of the Klein cubic threefold. https://arxiv.org/abs/1001.4853

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