Complete hyperbolic neighborhoods in almost-complex surfaces
Abstract
We prove that each point in an almost-complex surface has a basis of complete hyperbolic neighborhoods. The problem is local, and therefore we can consider the case when our surface is with an arbitrary almost-complex structure of class . Let be a non-singular -complex curve passing through the origin. Our result cah be stated as follows: There exists a basis of neighborhoods of zero in , such that are complete hyperbolic in the sence of Kobayashi, moreover are complete hyperbolic as well. The fact that this result remains true for any almost-complex structure is somewhat suprising. Really, given any germ of a non-singular real surface in , one can easily construct an almost-complex structure in a neighborhood of zero, such that becomes a -complex curve. Typical corollary is the following: Let be the Banach manifold consisting of pairs , where is any almost-complex structure on tamed by the Fubini-Studi form and the union of five -complex lines in in general position. The set consisting of with hyperbolically imbedded into is an open nonempty subset of .
Cite
@article{arxiv.math/0002156,
title = {Complete hyperbolic neighborhoods in almost-complex surfaces},
author = {R. Debalme and S. Ivashkovich},
journal= {arXiv preprint arXiv:math/0002156},
year = {2007}
}
Comments
12 pages