Weighted hypersurfaces with either assigned volume or many vanishing plurigenera
Algebraic Geometry
2012-03-14 v2
Abstract
In this paper we construct, for every n, smooth varieties of general type of dimension n with the first plurigenera equal to zero. Hacon-McKernan, Takayama and Tsuji have recently shown that there are numbers such that, for all r > , the r-canonical map of every variety of general type of dimension n is birational. Our examples show that grows at least quadratically as a function of n. Moreover they show that the minimal volume of a variety of general type of dimension n is smaller than . In addition we prove that for every positive rational number q there are smooth varieties of general type with volume q and dimension arbitrarily big.
Keywords
Cite
@article{arxiv.1102.3105,
title = {Weighted hypersurfaces with either assigned volume or many vanishing plurigenera},
author = {E. Ballico and R. Pignatelli and L. Tasin},
journal= {arXiv preprint arXiv:1102.3105},
year = {2012}
}
Comments
7 pages; v2: minor corrections, final version to be published in Communications in Algebra