On the Geometry of Some (α,β )-Metrics on the Nilpotent Groups H(p,r)

On the Geometry of Some (α,β )-Metrics on the Nilpotent Groups H(p,r)

In this paper we study the Riemann-Finsler geometry of the Lie groups H(p; r) which are ageneralization of the Heisenberg Lie groups. For a certain Riemannian metric h; i, the Levi-Civitaconnection and the sectional curvature are given. We classify all left invariant Randers metrics ofDouglas type induced by h; i, compute their flag curvatures and show that all of them are non-Berwaldian.

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  • [1] An H. and Deng S., Invariant (; )-metrics on homogeneous manifolds. Monatsh. Math. 154 (2008), 89-102.
  • [2] Asanov G.S., Finsler Geometry, Relativity and Gauge Theories. D. Reidel Pubishing Company, Dordrecht, Holland, 1985.
  • [3] Bacso S. and Matsumoto M., On Finsler spaces of Douglas type. A generalization of the notion of Berwald space. Publ. Math. Debrecen 51 (1997), 385-406.
  • [4] Bao D., Chern S. S. and Shen Z., An Introduction to Riemann-Finsler Geometry. Springer, 2000.
  • [5] Chern S. S. and Shen Z., Riemann-Finsler Geometry. World Scientific, Singapore, 2005.
  • [6] Deng S., Homogeneous Finsler Spaces. Springer, New York, 2012.
  • [7] Deng S., Hosseini M., Liu H. and Salimi Moghaddam H. R., On the left invariant (; )-metrics on some Lie groups. Houston J. Math. to appear.
  • [8] Deng S. and Hu Z., On Flag Curvature of Homogeneous Randers Spaces. Canad. J. Math. 65 (2013), no. 1, 66-81.
  • [9] Goze M. and Haraguchi Y., Sur les r-systemes de contact. C. R. Acad. Sci. Paris Ser. I Math. 294 (1982), 95-97.
  • [10] Piu P. and Goze M., On the Riemannian geometry of the nilpotent groups H(p; r). Proc. Am. Math. Soc. 119 (1993), 611-619.