English

Threefolds with Vanishing Hodge Cohomology

Algebraic Geometry 2007-05-23 v1

Abstract

We consider algebraic manifolds YY of dimension 3 over C\Bbb{C} with Hi(Y,ΩYj)=0H^i(Y, \Omega^j_Y)=0 for all j0j\geq 0 and i>0i>0. Let XX be a smooth completion of YY with D=XYD=X-Y, an effective divisor on XX with normal crossings. If the DD-dimension of XX is not zero, then YY is a fibre space over a smooth affine curve CC (i.e., we have a surjective morphism from YY to CC such that general fibre is smooth and irreducible) such that every fibre satisfies the same vanishing condition. If an irreducible smooth fibre is not affine, then the Kodaira dimension of XX is -\infty and the DD-dimension of X is 1. We also discuss sufficient conditions from the behavior of fibres or higher direct images to guarantee the global vanishing of Hodge cohomology and the affineness of YY.

Keywords

Cite

@article{arxiv.math/0312239,
  title  = {Threefolds with Vanishing Hodge Cohomology},
  author = {Jing Zhang},
  journal= {arXiv preprint arXiv:math/0312239},
  year   = {2007}
}

Comments

24 pages, accepted by Transactions of AMS

R2 v1 2026-07-22T17:00:40.840Z