Super-Ehlers in Any Dimension [PDF]
Sergio Ferrara, Alessio Marrani, Mario TrigianteWe classify the enhanced helicity symmetry of the Ehlers group to extended supergravity theories in any dimension. The vanishing character of the pseudo-Riemannian cosets occurring in this analysis is explained in terms of Poincar\'e duality. The latter resides in the nature of regularly embedded quotient subgroups which are non-compact rank preserving.View original: http://arxiv.org/abs/1206.1255
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