ON A CLASSIFICATION OF ALMOST ?-COSYMPLECTIC MANIFOLDS

Abstract

The object of the present paper is to study almost ?-cosymplectic manifolds. We consider projectively flat, conformally flat, and concircularly flat almost ?-cosymplectic manifolds (with the ?-parallel tensor field ?h) and get some new properties. We conclude the paper by giving an example of ?-Kenmotsu manifold, which verifies our results. © 2019 khayyam journal of mathematics.