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SCALAR CURVATURE OF CONTACT CR-SUBMANIFOLDS IN AN ODD-DIMENSIONAL UNIT SPHERE

  • Kim, Hyang-Sook (Department of Computational Mathematics School of Computer Aided Science Institute of Basic Science Inje University) ;
  • Pak, Jin-Suk (Department of Mathematics Education Kyungpook National University)
  • Received : 2008.12.04
  • Published : 2010.05.31

Abstract

In this paper we derive an integral formula on an (n + 1)-dimensional, compact, minimal contact CR-submanifold M of (n - 1) contact CR-dimension immersed in a unit (2m+1)-sphere $S^{2m+1}$. Using this integral formula, we give a sufficient condition concerning with the scalar curvature of M in order that such a submanifold M is to be a generalized Clifford torus.

Keywords

References

  1. A. Bejancu, Geometry of CR-Submanifolds, D. Reidel Publishing Company, Dordrecht, Boston, Lancaster, Tokyo, 1886.
  2. B. Y. Chen, Geometry of Submanifolds, Marcel Dekker Inc., New York, 1973.
  3. M. Djoric and M. Okumura, The scalar curvature of CR submanifolds of maximal CR dimension of complex projective space, Monatsh. Math. 154 (2008), no. 1, 11-17. https://doi.org/10.1007/s00605-007-0525-5
  4. J. Erbacher, Reduction of the codimension of an isometric immersion, J. Differential Geometry 5 (1971), 333-340.
  5. H. S. Kim and J. S. Pak, Certain contact CR-submanifolds of an odd-dimensional unit sphere, Bull. Korean Math. Soc. 44 (2007), no. 1, 109-116.
  6. H. S. Kim and J. S. Pak, Certain class of contact CR-submanifolds of an odd-dimensional unit sphere, to appear in Taiwanese Math. J.
  7. H. S. Kim and J. S. Pak, Scalar curvature of QR-submanifolds with maximal QR-dimension in a quaternionic projective space, submitted.
  8. M. Kon, On hypersurfaces immersed in ${S^{2n+1}$, Ann. Fac. Sci. Univ. Nat. Zaıre (Kinshasa) Sect. Math.-Phys. 4 (1978), no. 1, 1-24.
  9. J.-H. Kwon and J. S. Pak, On some contact CR-submanifolds of an odd-dimensional unit sphere, Soochow J. Math. 26 (2000), no. 4, 427-439.
  10. J. S. Pak, J.-H. Kwon, H. S. Kim, and Y.-M. Kim, Contact CR-submanifolds of an odd-dimensional unit sphere, Geom. Dedicata 114 (2005), 1-11. https://doi.org/10.1007/s10711-004-8175-9
  11. K. Yano, Integral Formulas in Riemannian Geometry, Pure and Applied Mathematics, No. 1 Marcel Dekker, Inc., New York 1970.
  12. K. Yano and M. Kon, CR Submanifolds of Kaehlerian and Sasakian Manifolds, Progress in Mathematics, 30. Birkhauser, Boston, Mass., 1983.

Cited by

  1. HOMOLOGY OF CONTACT CR-WARPED PRODUCT SUBMANIFOLDS OF AN ODD-DIMENSIONAL UNIT SPHERE vol.52, pp.1, 2015, https://doi.org/10.4134/BKMS.2015.52.1.215