We develop a new general method for computing the decomposition type of the normal bundle to a projective rational curve. This method is then used to detect and explain an example of a reducible Hilbert scheme parametrizing all the rational curves in P^s with a given decomposition type of the normal bundle. We also characterize smooth non degenerate rational curves contained in rational normal scrolls in terms of the splitting type of their restricted tangent bundles and compute their normal bundles.

Irreducible components of Hilbert schemes of rational curves with given normal bundle / A. Alzati, R. Re. - In: ALGEBRAIC GEOMETRY. - ISSN 2214-2584. - 4:1(2017), pp. 79-103.

Irreducible components of Hilbert schemes of rational curves with given normal bundle

A. Alzati
Primo
;
2017

Abstract

We develop a new general method for computing the decomposition type of the normal bundle to a projective rational curve. This method is then used to detect and explain an example of a reducible Hilbert scheme parametrizing all the rational curves in P^s with a given decomposition type of the normal bundle. We also characterize smooth non degenerate rational curves contained in rational normal scrolls in terms of the splitting type of their restricted tangent bundles and compute their normal bundles.
rational curve; normal bundle; Hilbert scheme
Settore MAT/03 - Geometria
2017
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/459202
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