Cotton tensor on Sasakian 3-manifolds admitting eta-Ricci solitons

The object of the present paper is to characterize Cotton tensor on a 3-dimensional Sasakian manifold admitting $\eta$-Ricci solitons. After introduction, we study manifolds and introduce new notion, namely, pseudo-symmetric manifolds. Next deal with 3-manifold Among others prove that such constant scalar curvature Einstein some appropriate conditions. Also, classify nature soliton metric. Finally, give an important remark.