English

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!