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Isometric Immersions of Hypersurfaces in 4-dimensional Manifolds via Spinors
Marie-Amélie Lawn 1, Julien Roth 2
(18/03/2008)

We give a spinorial characterization of isometrically immersed hypersurfaces into 4-dimensional space forms and product spaces $\M^3(\kappa)\times\R$, in terms of the existence of particular spinor fields, called generalized Killing spinors or equivalently solutions of a Dirac equation. This generalizes to higher dimensions several recent results for surfaces by T.\,Friedrich, B.\,Morel and the two authors. The main argument is the interpretation of the energy-momentum tensor of a generalized Killing spinor as the second fundamental form, possibly up to a tensor depending on the ambient space.
1 :  Unité de recherche en mathématiques
Université de Luxembourg
2 :  Laboratoire Jean Alexandre Dieudonné (JAD)
CNRS : UMR6621 – Université Nice Sophia Antipolis [UNS]
Mathématiques/Géométrie différentielle
Dirac Operator – Generalized Killing Spinors – Isometric Immersions – Gauss and Codazzi-Mainardi Equations
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