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Proceedings of the American Mathematical Society
Article . 1970 . Peer-reviewed
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Proceedings of the American Mathematical Society
Article . 1970 . Peer-reviewed
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Some Results Concerning Hyperbolic Manifolds

Some results concerning hyperbolic manifolds
Authors: Kiernan, Peter;

Some Results Concerning Hyperbolic Manifolds

Abstract

A complex manifold is (complete) hyperbolic if the Kobayashi pseudo-distance is a (complete) distance. In this note, it is shown that a fibre bundle is (complete) hyperbolic if both the base and fibre are (complete) hyperbolic. Two examples are also given. The first shows that the completion of a hyperbolic manifold is not necessarily locally compact. The second shows that one generalization of the big Picard theorem is false. In this note, we give an example of a hyperbolic manifold MV whose completion M* is not locally compact. It is also shown that a fibre bundle E is (complete) hyperbolic if both the base and fibre are (complete) hyperbolic. We begin by recalling the definition of the Kobayashi pseudodistance dm associated to the complex manifold M. Let p and q be points in M. By a chain a from p to q, we mean a sequence p =Po, Pl, * *, p= q of points in AM, points a1, * * *, ak in the unit disk D= {zECI zI <1} and holomorphic mapsfi, * , f' of D into M with fi(O) = pi-, and fi(ai) = pi. The length Ia I of a is defined by kc k 1-1Iai =E d(O, ai) E log i=l i=l 1 ai where d is the Poincare&Bergman distance on D. It is given by the metric ds2 -(1/(1 Iz 2)2)dzdz. We set dm(p, q) =-infaEA Ia , where A is the set of all chains fromi p to q. It is easy to see that dM is a pseudodistance on Mi. If dM is an actual distance, we say that M is hyperbolic. M is called comnplete hyperbolic if dml is a complete metric, i.e., if all Cauchy sequences converge. it follows immediately from the definition of dm and dv, that if f: Ml-N is holomorphic and p, qClI, thenl djr(J(p), f(q))

Keywords

complex functions

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
7
Average
Top 10%
Average
bronze
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