Some properties of Fano manifolds that are zeros of sections in homogenous vector bundles over Grassmannians

Abstract

Let $X$ be a Fano manifold which is the zero scheme of a general global section $s$ in an irreducible homogenous vector bundle over a Grassmannian. We prove that the restriction of the Plücker embedding embeds $X$ projectively normal, and that every small deformation of $X$ comes from a deformation of the section $s$. These results are strengthened in the case of Fano 4-folds.

arXiv comment8 pages, AmS-TeX 2.1