Double space with double line

I. A. Cheltsov

Sbornik. Mathematics, Tome 195 (2004) no. 10, pp. 1503-1544

Résumé

For a singular double cover of $\mathbb P^3$ ramified in a sextic with double line, its birational maps into Fano 3-folds with canonical singularities, elliptic fibrations, and fibrations on surfaces of Kodaira dimension zero are described.

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