Three dimensional semi-symmetric and pseudo-symmetric almost alpha-cosymplectic manifolds

This thesis consists of five chapters. The first chapter is devoted to the introduction section and provide a general knowledge of literature. In the second chapter, the necessary basic concepts and definitions are presented. In the third chapter, the structure of almost alpha-cosymplectic manifold is introduced and explained with an example. In the fourth chapter, some results related to some certain semi-symmetric almost alpha-cosymplectic manifolds are obtained. In the fifth chapter, three dimensional pseudo-symmetric alpha-Kenmotsu manifolds are addressed in detail and some results are given.