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Szabo, Z.I. (1991) A Simple Topological Proof for the Symmetry of 2 Point Homogeneous Spaces. Inventiones Mathematicae, 106, 61-64.
https://doi.org/10.1007/BF01243903

has been cited by the following article:

• TITLE: Osserman Conditions in Lightlike Warped Product Geometry

  AUTHORS: Domitien Ndayirukiye, Aboubacar Nibirantiza, Gilbert Nibaruta, Ménédore Karimumuryango

  KEYWORDS: Lightlike Warped Product Manifolds, Curvature Tensor, Pseudo-Jacobi Operator

  JOURNAL NAME: Journal of Applied Mathematics and Physics, Vol.8 No.4, March 25, 2020

  ABSTRACT: In this paper, we consider Osserman conditions on lightlike warped product (sub-)manifolds with respect to the Jacobi Operator. We define the Jacobi operator for lightlike warped product manifold and introduce a study of lightlike warped product Osserman manifolds. For the coisotropic case with totally degenerates first factor, we prove that this class consists of Einstein and locally Osserman lightlike warped product.