The Cauchy problem for metrics with parallel spinors
by
Bernd Ammann, Andrei Moroianu, Sergiu Moroianu


The Cauchy problem for metrics with parallel spinors (.ps,.ps.gz or .pdf)
Commun. Math. Phys. 320 173-198 (2013),
http://dx.doi.org/10.1007/s00220-013-1714-1


Abstract

We show that in the analytic category, given a Riemannian metric g on a hypersurface M in Z and a symmetric tensor W on M, the metric g can be locally extended to a Riemannian Einstein metric on Z with second fundamental form W, provided that g and W satisfy the constraints on M imposed by the contracted Codazzi equations. We use this fact to study the Cauchy problem for metrics with parallel spinors in the real analytic category and give an affirmative answer to a question raised in a previous article by Bär-Gauduchon-Moroianu. We also answer negatively the corresponding questions in the smooth category.
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The Paper was written on 1.12.2011
Last update 21.11.2012