Standard Tractors and the Conformal Ambient Metric Construction

Details Standard Tractors and the Conformal Ambient Metric Construction Standard Tractors and the Conformal Ambient Metric Construction

2002-07-02

arxiv.org/abs/math/0207016v1

Annals Global Anal.Geom. 24 (2003) 231-259

Mathematics

Differential Geometry

AMSLaTeX, 26 pages

Scientific paper

In this paper we relate the Fefferman-Graham ambient metric construction for conformal manifolds to the approach to conformal geometry via the canonical Cartan connection. We show that from any ambient metric that satisfies a weakening of the usual normalisation condition, one can construct the conformal standard tractor bundle and the normal standard tractor connection, which are equivalent to the Cartan bundle and the Cartan connection. This result is applied to obtain a procedure to get tractor formulae for all conformal invariants that can be obtained from the ambient metric construction. We also get information on ambient metrics which are Ricci flat to higher order than guaranteed by the results of Fefferman-Graham.

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