Some curvature conditions on para-Sasakian manifolds

The aim of this thesis is to examine some properties of tensör fields in para-Sasakian manifolds. This thesis consists of four parts. The first part of the thesis is the introductory part, and almost the studies on paracontact manifolds are emphasized. In the seccont and third chapters, some basic definitions and thorems related to semi-Riemann manifolds are examined, and the concepts of cocircular curvature tensor and projective curvature tensor are given. In the fourth chapter, some curvature conditions on para-Sasakian manifolds are examined and some classifications are optained on this manifolds.