Asymptotics of ACH-Einstein metrics

Details Asymptotics of ACH-Einstein metrics Asymptotics of ACH-Einstein metrics

2010-09-21

arxiv.org/abs/1009.4163v2

Mathematics

Differential Geometry

44 pages; introduction rewritten, proof of Proposition 1.4 fixed, minor modifications added

Scientific paper

We study the boundary asymptotics of ACH metrics which are formally Einstein. In terms of the partially integrable almost CR structure induced on the boundary at infinity, existence and uniqueness of such formal asymptotic expansions are studied. It is shown that there always exist formal solutions to the Einstein equation if we allow logarithmic terms, and that a local CR-invariant tensor arises as the obstruction to the existence of a log-free solution. Some properties of this new CR invariant, the CR obstruction tensor, are discussed.

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