A note on almost Ricci soliton and gradient almost Ricci soliton on para-Sasakian manifolds
Krishnendu De,Uday Chand De +1 more
TLDR
In this article, it was shown that if a 3D para-Sasakian manifold admits gradient almost Ricci soliton under certain conditions then either the manifold is of constant sectional curvature $-1$ or it reduces to a gradient Ricci Soliton.Abstract:
The object of the offering exposition is to study almost Ricci soliton and gradient almost Ricci soliton in 3-dimensional para-Sasakian manifolds. At first, it is shown that if $(g, V,\lambda)$ be an almost Ricci soliton on a 3-dimensional para-Sasakian manifold $M$, then it reduces to a Ricci soliton and the soliton is expanding for $\lambda$=-2. Besides these, in this section, we prove that if $V$ is pointwise collinear with $\xi$, then $V$ is a constant multiple of $\xi$ and the manifold is of constant sectional curvature $-1$. Moreover, it is proved that if a 3-dimensional para-Sasakian manifold admits gradient almost Ricci soliton under certain conditions then either the manifold is of constant sectional curvature $-1$ or it reduces to a gradient Ricci soliton. Finally, we consider an example to justify some results of our paper.read more
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Journal ArticleDOI
Ricci almost solitons
TL;DR: The Ricci almost soliton as discussed by the authors is a natural extension of the concept of gradient Ricci soliton, and it has been shown to be a generalization of the Ricci Almost Soliton.
Journal ArticleDOI
Almost paracontact and parahodge structures on manifolds
Soji Kaneyuki,Floyd L. Williams +1 more
Journal ArticleDOI
Ricci almost solitons
TL;DR: The Ricci almost soliton as discussed by the authors is a natural extension of the concept of gradient Ricci soliton, and it can be seen as a natural solution to the problem of gradient almost solitons.