English

Symmetric differentials on complex hyperbolic manifolds with cusps

Algebraic Geometry 2017-03-22 v4 Differential Geometry

Abstract

Let (X,D)(X, D) be a logarithmic pair, and let hh be a singular metric on the tangent bundle, smooth on the open part of XX. We give sufficient conditions on the curvature of hh for the logarithmic and the standard cotangent bundles to be big. As an application, we give a metric proof of the bigness of logarithmic cotangent bundle on any toroidal compactification of a bounded symmetric domain. Then, we use this singular metric approach to study the bigness and the nefness of the standard tangent bundle in the more specific case of the ball. We obtain effective ramification orders for a cover XXX' \longrightarrow X, \'{e}tale outside the boundary, to have all its subvarieties with big cotangent bundle. We also prove that the standard tangent bundle of such a cover is nef if the ramification is high enough. Moreover, the ramification orders we obtain do not depend on the dimension of the quotient of the ball we consider.

Keywords

Cite

@article{arxiv.1606.05470,
  title  = {Symmetric differentials on complex hyperbolic manifolds with cusps},
  author = {Benoit Cadorel},
  journal= {arXiv preprint arXiv:1606.05470},
  year   = {2017}
}
R2 v1 2026-06-22T14:27:48.023Z