Просмотр по автору "Ganji, Masoud"

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  • The Levi-Civita connections of Lorentzian manifolds with prescribed optical geometries 
    Alekseevskiy, Dmitry; Ganji, Masoud; Schmalz, Gerd; Spiro, Andrea (Universidad de La Frontera, 2024)
    We explicitly derive the Christoffel symbols in terms of adapted frame fields for the Levi-Civita connection of a Lorentzian n-manifold ( M, g ) , equipped with a prescribed optical geometry of Kahler-Sasaki type. The ...
  • Lorentzian manifolds with shearfree congruences and Kahler-Sasaki geometry 
    Alekseevskiy, Dmitry; Ganji, Masoud; Schmalz, Gerd; Spiro, Andrea (ELSEVIER, 2021)
    We study Lorentzian manifolds (M, g) of dimension n >= 4, equipped with a maximally twisting shearfree null vector field p, for which the leaf space S=M/{exptp} is a smooth manifold. If n = 2k, the quotient S = M/{exptp} ...

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