Abstract
A well-known question of Perelman concerns the classification of noncompact ancient solutions to the Ricci flow in dimension 3 which have positive sectional curvature and are \(\kappa \)-noncollapsed. In this paper, we solve the analogous problem for mean curvature flow in \({\mathbb {R}}^3\), and prove that the rotationally symmetric bowl soliton is the only noncompact ancient solution of mean curvature flow in \({\mathbb {R}}^3\) which is strictly convex and noncollapsed.
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The first author was supported by the National Science Foundation under Grant DMS-1649174 and by the Simons Foundation. The second author was supported by the National Science Foundation under Grant DMS-1811267. The authors gratefully acknowledge the hospitality of Tübingen University, where part of this work was carried out.
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Brendle, S., Choi, K. Uniqueness of convex ancient solutions to mean curvature flow in \({\mathbb {R}}^3\). Invent. math. 217, 35–76 (2019). https://doi.org/10.1007/s00222-019-00859-4
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DOI: https://doi.org/10.1007/s00222-019-00859-4