Abstract

Suppose {(M, g(t)), 0 ≤ t < ∞} is a Kahler Ricci flow solution on a Fano surface. If |Rm| is not uniformly bounded along this flow, we can blowup at the maximal curvature points to obtain a limit complete Riemannian manifold X. We show that X must have certain topological and geometric properties. Using these properties, we are able to prove that |Rm| is uniformly bounded along every Kahler Ricci flow on toric Fano surface, whose initial metric has toric symmetry. In particular, such a Kahler Ricci flow must converge to a Kahler Ricci soliton metric. Therefore we give a new Ricci flow proof of the existence of Kahler Ricci soliton metrics on toric Fano surfaces.

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