Short-time existence for the second order renormalization group flow in   general dimensions
  We prove local existence for the second order Renormalization Group flow initial value problem on closed Riemannian manifolds $(M,g)$ in general dimensions, for initial metrics whose sectional curvatures $K_P$ satisfy the condition $1+\alpha K_P > 0$, at all points $p \in M$ and planes $P \subset T_p M$. This extends results previously proven for two and three dimensions. 
Karsten Gimre, Christine Guenther, James Isenberg
math.DG