Ricci flow on Orbifold

Details Ricci flow on Orbifold Ricci flow on Orbifold

2010-02-28

arxiv.org/abs/1003.0151v2

Mathematics

Differential Geometry

Scientific paper

In this paper, we study the behavior of Ricci flows on compact orbifolds with finite singularities. We show that Perelman's pseudolocality theorem also holds on orbifold Ricci flow. Using this property, we obtain a weak compactness theorem of Ricci flows on orbifolds under some natural technical conditions. This generalizes the corresponding theorem on manifolds. As an application, we can use K\"ahler Ricci flow to find new K\"ahler Einstein metrics on some orbifold Fano surfaces. For example, if $Y$ is a cubic surface with only one ordinary double point or $Y$ is an orbifold Fano surface with degree 1 and every singularity on it is a rational double point of type $\A_k (1 \leq k \leq 6)$, then we can find a KE metric of $Y$ by running K\"ahler Ricci flow.

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