On locally $\phi$-semisymmetric Sasakian manifolds

Year 2019, Volume: 48 Issue: 4, 1156 - 1169, 08.08.2019

Absos Ali Shaikh Chandan Kumar Mondal Helaluddin Ahmad

Abstract

Generalizing the notion of local $\phi$-symmetry of Takahashi [Sasakian $\phi$-symmetric spaces, Tohoku Math. J., 1977], in the present paper, we introduce the notion of  \textit{local $\phi$-semisymmetry} of a Sasakian manifold along with its proper existence and characterization. We also study the notion of  local Ricci (resp., projective, conformal) $\phi$-semisymmetry of a  Sasakian manifold and obtain its characterization. It is shown that the local $\phi$-semisymmetry, local projective $\phi$-semisymmetry and local concircular $\phi$-semisymmetry are equivalent. It is also shown that local conformal $\phi$-semisymmetry and local conharmonical $\phi$-semisymmetry are equivalent.

Keywords

Sasakian manifold , locally $\phi$-symmetric , $\phi$-semisymmetric , Ricci $\phi$-semisymmetric , projectively $\phi$-semisymmetric , conformally $\phi$-semisymmetric , manifold of constant curvature , $B$-tensor , $B$-$\phi$-semisymmetric

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