Pseudolocality for the Ricci flow and applications

Details Pseudolocality for the Ricci flow and applications Pseudolocality for the Ricci flow and applications

2007-01-05

arxiv.org/abs/math/0701153v2

Mathematics

Differential Geometry

44 pages; added Corollary to Theorem 1.1; correction to Theorem 8.1

Scientific paper

In \cite{P1}, Perelman established a differential Li-Yau-Hamilton (LYH) type inequality for fundamental solutions of the conjugate heat equation corresponding to the Ricci flow on compact manifolds (also see \cite{N2}). As an application of the LYH inequality, Perelman proved a pseudolocality result for the Ricci flow on compact manifolds. In this article we provide the details for the proofs of these results in the case of a complete non-compact Riemannian manifold. Using these results we prove that under certain conditions, a finite time singularity of the Ricci flow must form within a compact set. We also prove a long time existence result for the \KRF flow on complete non-negatively curved \K manifolds.

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