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JMB Journal of Microbiolog and Biotechnology

OPEN ACCESS eISSN 0454-8124
pISSN 1225-6951
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Original Article

Kyungpook Mathematical Journal 2008; 48(3): 433-442

Published online September 23, 2008

Copyright © Kyungpook Mathematical Journal.

Real Hypersurfaces in Complex Hyperbolic Space with Commuting Ricci Tensor

U-Hang Ki1, Young Jin Suh2

1The National Academy of Sciences, Seoul 137-044, Korea
2Department of Mathematics, Kyungpook National University, Daegu 702-701, Korea

Abstract

In this paper we consider a real hypersurface $M$ in complex hyperbolic space $H_n mathbb{C}$ satisfying $S phi A = phi AS$, where $phi$, $A$ and $S$ denote the structure tensor, the shape operator and the Ricci tensor of $M$ respectively. Moreover, we give a characterization of real hypersurfaces of type $mathrm A$ in $H_n mathbb{C}$ by such a commuting Ricci tensor.

Keywords: real hypersurface, Ricci tensor, Hopf hypersurface