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Finite extinction time for the solutions to the Ricci flow on certain three-manifolds

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arxiv math/0307245 v1 pith:DVVL6FPO submitted 2003-07-17 math.DG

classification math.DG
keywords flowfinitericcitimealtschulerargumentasphericalbecomes
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Let M be a closed oriented three-manifold, whose prime decomposition contains no aspherical factors. We show that for any initial riemannian metric on M the solution to the Ricci flow with surgery, defined in our previous paper math.DG/0303109, becomes extinct in finite time. The proof uses a version of the minimal disk argument from 1999 paper by Richard Hamilton, and a regularization of the curve shortening flow, worked out by Altschuler and Grayson.

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