Asymptotic syzygies and higher order embeddings
Algebraic Geometry
2018-05-08 v3 Commutative Algebra
Abstract
We show that vanishing of asymptotic p-th syzygies implies p-very ampleness for line bundles on arbitrary projective schemes. For smooth surfaces we prove that the converse holds when p is small, by studying the Bridgeland-King-Reid-Haiman correspondence for tautological bundles on the Hilbert scheme of points. This extends previous results of Ein-Lazarsfeld, Ein-Lazarsfeld-Yang and gives a partial answer to some of their questions. As an application of our results, we show how to use syzygies to bound the irrationality of a variety.
Keywords
Cite
@article{arxiv.1706.03508,
title = {Asymptotic syzygies and higher order embeddings},
author = {Daniele Agostini},
journal= {arXiv preprint arXiv:1706.03508},
year = {2018}
}
Comments
21 pages. The application to 3-spannedness has been removed, because of a gap in the proof. The main results are unchanged. Added references and corrected typos. Comments very welcome!