On the rigidity of generalized $m$-quasi-Einstein manifolds of Yamabe-type

Abstract

Motivated by the concept of almost Yamabe solitons, a special class of generalized $m$-quasi-Einstein manifolds is investigated in this paper. We refer to these Riemannian manifolds as generalized $m$-quasi-Einstein manifolds of Yamabe-type. We study the rigidity properties for the potential (or defining) vector field associated to these manifolds in both the compact and non-compact settings. We show that under certain natural assumptions the potential vector field either vanishes identically or becomes a non-trivial Killing vector field.

v2: 14 pages. Comments are most welcome