M theory duality and BPS extended supergravity

@inproceedings{Wit2000MTD,
  title={M theory duality and BPS extended supergravity},
  author={Bernard de Wit},
  year={2000}
}
We discuss toroidal compactifications of maximal supergravity coupled to an extended configuration of BPS states which transform consistently under the U-duality group. Under certain conditions this leads to theories that live in more than eleven space-time dimensions, with maximal supersymmetry but only partial Lorentz invariance. We demonstrate certain features of this construction for the case of nine-dimensional N=2 supergravity. 

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