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Résumé |
Local USp(8) invariance and E6(6) covariance of IIB supergravity is analyzed in a form where the embedding
of the five-dimensional maximal supergravity is made manifest. The ten-dimensional theory yields all the
27 one-form fields and 22 of the 27 two- form fields that are required by the vector-tensor hierarchy of
the five-dimensional theory. The missing 5 two-form fields emerge from the elusive ‘dual graviton’. The
implications are discussed as well as a partial proof of the consistency of the truncation of IIB supergravity
on the five-sphere.
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