Del Pezzo surface fibrations obtained by blow-up of a smooth curve in a projective manifold

Abstract

This Note is devoted to the study of the Fano manifolds X obtained by blow-up along a smooth curve C in a complex projective manifold Y. By the Mori theory, we can ensure the existence of an extremal contraction φ : X → Z different from the blow-up π : X → Y . Here we give the complete classification of the corresponding pairs ( Y , C ) in the case where φ is a fiber type contraction of relative dimension 2, i.e. the general fibers of φ are del Pezzo surfaces. In Tsukioka (Thesis, Nancy University 1, 2005), the relative dimension 1 case is also considered. To cite this article: T. Tsukioka, C. R. Acad. Sci. Paris, Ser. I 340 (2005).