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Creators/Authors contains: "Van_Proeyen, Antoine"

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  1. ; ; (, Journal of High Energy Physics)
    A<sc>bstract</sc> We discuss known maximalD-dimensional supergravities of two types: type I withG/Hcoset spaces and type II derived by compactification from higher dimensions without dualization, these have less manifest symmetries. In 4Dand 6Din type I models we perform explicit gauge-fixing of localHsymmetries in unitary gauges: symmetric, Iwasawa and partial Iwasawa. In 4Dsupergravity I in symmetric gauge globalH-invariance and nonlinearly realizedG-symmetry are valid on shell, classically. The globalH-symmetry andG-symmetry in Iwasawa-type gauges in type I and in type II supergravities are not manifest, if at all present. This fact raises the issue of the gauge equivalence of the S-matrix of various gauge-fixedD-dimensional supergravities and its relation to the ones computable using superamplitude methods. 
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