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
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