Long Time Existence of the Cross Curvature Flow in 3-Manifolds with   Negative Sectional Curvature
  Given a closed 3-manifold with an initial Riemannian metric of negative sec- tional curvature, we consider the cross curvature flow an evolution equation of metric on M3. We prove long-time existence of a solution to the cross curvature flow via the maximum principle theorem. Besides, we demonstrate the solution exists for all time and converges pointwisely to a hyperbolic metric 
Wei-Hung Liao
math.DG math.AP