B. Y. Chen inequalities for submanifolds of a Riemannian manifold of quasi-constant curvature

In this paper, we prove B. Y. Chen inequalities for submanifolds of a Riemannian manifold of quasi-constant curvature, i.e., relations between the mean curvature, scalar and sectional curvatures, Ricci curvatures and the sectional curvature of the ambient space. The equality cases are considered.

B. Y. Chen inequalities for submanifolds of a Riemannian manifold of quasi-constant curvature

In this paper, we prove B. Y. Chen inequalities for submanifolds of a Riemannian manifold of quasi-constant curvature, i.e., relations between the mean curvature, scalar and sectional curvatures, Ricci curvatures and the sectional curvature of the ambient space. The equality cases are considered.

___

  • 1] Arslan, K., Ezenta¸s, R., Mihai, I., Murathan, C., Ozg¨ ¨ ur, C.: B. Y. Chen inequalities for submanifolds in locally conformal almost cosymplectic manifolds. Bull. Inst. Math., Acad. Sin. 29, 231-242 (2001).
  • [2] Arslan, K., Ezenta¸s, R., Mihai, I., Murathan, C., Ozg¨ ¨ ur, C.: Certain inequalities for submanifolds in (k ,μ)-contact space forms. Bull. Aust. Math. Soc. 64, 201-212 (2001).
  • [3] Arslan, K., Ezenta¸s, R., Mihai, I., Murathan, C., Ozg¨ ¨ ur, C.: Ricci curvature of submanifolds in locally conformal almost cosymplectic manifolds. Math. J. Toyama Univ. 26, 13-24 (2003).
  • 4] Chaki, M.C., Maity, R.K.: On quasi-Einstein manifolds, Publ. Math. Debrecen 57, 297–306 (2000).
  • [5] Chen, B.Y.: Geometry of submanifolds. Pure and Applied Mathematics, No. 22. Marcel Dekker, Inc., New York, 1973.
  • [6] Chen, B.Y.: Some pinching and classification theorems for minimal submanifolds. Arch. Math. (Basel) 60, 568–578 (1993).
  • [7] Chen, B.Y.: Strings of Riemannian invariants, inequalities, ideal immersions and their applications. In: The Third Pacific Rim Geometry Conference (Seoul, 1996) 7–60, Monogr. Geom. Topology, 25, Int. Press, Cambridge, MA, 1998.
  • [8] Chen, B.Y.: Relations between Ricci curvature and shape operator for submanifolds with arbitrary codimensions. Glasg. Math. J. 41, 33–41 (1999).
  • [9] Chen, B.Y.: Some new obstructions to minimal and Lagrangian isometric immersions. Japan. J. Math. (N.S.) 26, 105–127 (2000).
  • [10] Chen, B.Y.: δ -invariants, Inequalities of Submanifolds and Their Applications. In: Topics in Differential Geometry, Eds. A. Mihai, I. Mihai, R. Miron 29-156, Editura Academiei Romane, Bucuresti, 2008.
  • [11] Chen, B.Y., Yano, K.: Hypersurfaces of a conformally flat space. Tensor (N.S.) 26, 318-322 (1972).
  • [12] Matsumoto, K., Mihai, I, Oiaga, A.: Ricci curvature of submanifolds in complex space forms. Rev. Roumaine Math. Pures Appl. 46, 775–782 (2001).
  • [13] Mihai, A.: Modern Topics in Submanifold Theory, Editura Universitatii Bucuresti, Bucharest, 2006.
  • [14] Oiaga, A., Mihai, I.: B. Y. Chen inequalities for slant submanifolds in complex space forms. Demonstratio Math. 32, 835–846 (1999).