Certain Characterization of Real Hypersurfaces of type A in a Nonflat Complex Space Form
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Let M be a real hypersurface with almost contact metric structure (φ, ξ, η, g) in a nonflat complex space form Mn(c). We denote S and Rξ by the Ricci tensor of M and by the structure Jacobi operator with respect to the vector field ξ respectively. In this paper, we prove that M is a Hopf hypersurface of type A in Mn(c) if it satisfies Rξφ = φRξ and at the same time Rξ(Sφ − φS) = 0.
Abstract
Let M be a real hypersurface with almost contact metric structure (φ, ξ, η, g) in a nonflat complex space form Mn(c). We denote S and Rξ by the Ricci tensor of M and by the structure Jacobi operator with respect to the vector field ξ respectively. In this paper, we prove that M is a Hopf hypersurface of type A in Mn(c) if it satisfies Rξφ = φRξ and at the same time Rξ(Sφ − φS) = 0.
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