The closedness of some generalized curvature 2-forms on a Riemannian manifold II

In this paper we recall the closedness properties of generalized curvature 2-forms, which are said to be Riemannian, Conformal, Projective, Concircular and Conharmonic curvature 2-forms, given in [16]. Moreover, we extend the concept of recurrent generalized curvature tensor to the associated curvature 2-forms while generalizing some known results. In particular, we introduce the recurrence of the Conformal curvature 2-form and give some interesting theorems. In the final section we focus on the closedness of the associated 2-forms for curvature-like tensors.