• Alessio Marrani

      Articles written in Pramana – Journal of Physics

    • Black holes and groups of type $E_7$

      Sergio Ferrara Alessio Marrani

      More Details Abstract Fulltext PDF

      We report some results on the relation between extremal black holes in locally supersymmetric theories of gravity and groups of type $E_7$, appearing as generalized electric-magnetic duality symmetries in such theories. Some basics on the covariant approach to the stratification of the relevant symplectic representation are reviewed, along with a connection between special Kähler geometry and a ‘generalization’ of groups of type $E_7$.

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