The Ricci flow with metric torsion on closed surfaces
  The famous Uniformization Theorem states that on closed Riemannian surfaces there always exists a metric of constant curvature for the Levi-Cevita connection. In this article we prove that an analogue of the uniformization theorem also holds for connections with metric torsion in the case of non-positive Euler characteristic. Our main tool is an adapted form of the Ricci flow. 
Volker Branding, Klaus Kroencke
math.DG math.AP