English

Global division of cohomology classes via injectivity

Algebraic Geometry 2008-08-18 v2 Complex Variables

Abstract

We note that the vanishing and injectivity theorems of Koll\'ar and Esnault-Viehweg can be used to give a quick algebraic proof of a strengthening of the Ein-Lazarsfeld Skoda-type division theorem for global sections of adjoint line bundles vanishing along suitable multiplier ideal sheaves, and to extend it to higher cohomology classes as well. For global sections, this is also a slightly more general statement of the algebraic translation of an analytic result of Siu. Along the way we write down an injectivity statement for multiplier ideals, and its standard consequences.

Keywords

Cite

@article{arxiv.0712.3186,
  title  = {Global division of cohomology classes via injectivity},
  author = {Lawrence Ein and Mihnea Popa},
  journal= {arXiv preprint arXiv:0712.3186},
  year   = {2008}
}

Comments

10 pages; dedication included, and minor corrections made; to appear in the Michigan Math. J. volume in honor of Mel Hochster's 65th birthday