Semi-invariant submanifolds of codimension 3 of a complex projective space in terms of the Jacobi operator

다국어 초록 (Multilingual Abstract)

In this paper, we characterize some semi-invariantsubmanifolds of codimension 3 with almost contact metric structure(phi, xi, g) in a complex projective space Bbb CP^{n+1} interms of the structure tensor phi, the Ricci tensor S and theJacobi operator R_xi with respect to the structure vectorxi.

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