Some curvature conditions on almost paracontact manifolds wi̇th quasi constant curvature

The aim of this thesis is to study some curvature conditions on almost paracontact manifolds with the quasi constant curvature. This thesis has five chapters.In the first chapter of thesis is reserved for entry and the studies on almost paracontact manifolds are mentioned. In the second and third section, semi-Riemannian manifolds are introduced, concircular curvature tensor and projective curvature tensor are examined. Also basic definitions and theorems about almost paracontact manifolds are given. In the fourth section, Riemannian curvature tensor, concircular curvature tensor and projective curvature tensor on almost paracontact manifolds with quasi constant curvature are introduced. In the last section some curvature conditions on almost paracontact manifolds with quasi constant curvature are classified.