Almost ricci soliton and gradient almost ricci soliton on 3-dimensional normal almost contact metric manifolds

摘要

ublishercopyright>? 2019 Novi Sad Journal of Mathematics. All rights reserved.? 2019 Novi Sad Journal of Mathematics. All rights reserved. The object of the present paper is to study almost Ricci solitons and gradient almost Ricci solitons in 3-dimensional non-cosymplectic normal almost contact metric manifolds.The object of the present paper is to study almost Ricci solitons and gradient almost Ricci solitons in 3-dimensional non-cosymplectic normal almost contact metric manifolds.