Curves on Rational Surfaces with Hyperelliptic Hyperplane Sections

Details Curves on Rational Surfaces with Hyperelliptic Hyperplane Sections Curves on Rational Surfaces with Hyperelliptic Hyperplane Sections

2011-01-03

arxiv.org/abs/1101.0577v1

Mathematics

Algebraic Geometry

39 pages; work presented at several Conferences and in several talks at: Harvard/MIT seminar, MSRI Berkeley, Univ. of Tokyo, A

Scientific paper

In this article we study, given a pair of integers (d,g), the problem of existence of a smooth, irreducible, non-degenerate curve in the projective n-domensional space of degree d and genus g (the Halphen-Castelnuovo Problem). We define two domains from the (d,g)-plane, D1,n and D2,n, and we prove that there is no gap in D1,n. This follows by constructing curves on some rational surfaces with hyperelliptic hyperplane sections, and from some previous Theorems of Ciliberto, Sernesi, and of the author. Moreover, in the last section, based on some results of Horrowitz, Ciliberto, Harris, Eisenbud, we Conjecture that D2,n is the right lacunary domain.

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