Remarks on non-compact complete Ricci expanding solitons

Li Ma, Dezhong Chen

In this paper, we study gradient Ricci expanding solitons $(X,g)$ satisfying $$Rc=cg+D^{2}f,$$ where $Rc$ is the Ricci curvature, $c<0$ is a constant, and $D^{2}f$ is the Hessian of…