Super-Ehlers in Any Dimension

Understand

We 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.