Backward Ricci Flow on Locally Homogeneous Three-manifolds
arXiv:0810.3352
Abstract
In this paper, we study the backward Ricci flow on locally homogeneous 3-manifolds. We describe the long time behavior and show that, typically and after a proper re-scaling, there is convergence to a sub-Riemannian geometry. A similar behavior was observed by the authors in the case of the cross curvature flow.
17 pages, references added, final version