Natural intrinsic geometrical symmetries.
Haesen, Stefan, Verstraelen, Leopold (2009)
SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
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Haesen, Stefan, Verstraelen, Leopold (2009)
SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
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Giovanni Calvaruso (2010)
Archivum Mathematicum
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We study conformally flat Lorentzian three-manifolds which are either semi-symmetric or pseudo-symmetric. Their complete classification is obtained under hypotheses of local homogeneity and curvature homogeneity. Moreover, examples which are not curvature homogeneous are described.
M. T. K. Abbassi, Giovanni Calvaruso (2012)
Archivum Mathematicum
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We completely classify Riemannian -natural metrics of constant sectional curvature on the unit tangent sphere bundle of a Riemannian manifold . Since the base manifold turns out to be necessarily two-dimensional, weaker curvature conditions are also investigated for a Riemannian -natural metric on the unit tangent sphere bundle of a Riemannian surface.
Labbi, Mohammed-Larbi (2007)
SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
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Endo, Hiroshi (2005)
APPS. Applied Sciences
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Kadri Arslan, Ryszard Deszcz, Şahnur Yaprak (1997)
Colloquium Mathematicae
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S. Haesen, A. Šebeković, L. Verstraelen (2003)
Kragujevac Journal of Mathematics
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