Convergence of the Ricci flow for metrics with indefinite Ricci curvature
Hamilton's Ricci flow convergence theorems generally deal with metrics whose Ricci curvature is positive semidefinite. Here, we exhibit a nontrivial class of three-dimensional Riemannian metrics with Ricci curvature of indefinite sign for which the Ricci flow converges.
parabolic partial differential equations in geometry
scientific article; zbMATH DE number 4056476