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Appearance of stable
minimal spheres along the Ricci flow in positive scalar
curvature
Antoine Song |
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Geometry & Topology 23 (2019) 3501–3535
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Abstract |
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We construct spherical space forms with positive scalar curvature and containing no stable embedded minimal surfaces such that the following happens along the Ricci flow starting at : a stable embedded minimal –sphere appears and a nontrivial singularity occurs. We also give in dimension a general construction of Type I neckpinching and clarify the relationship between stable spheres and nontrivial Type I singularities of the Ricci flow. Some symmetry assumptions prevent the appearance of stable spheres, and this has consequences on the types of singularities which can occur for metrics with these symmetries. |
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Keywords
Ricci flow, minimal spheres, scalar curvature
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Mathematical Subject Classification 2010
Primary: 53A10, 53C44
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References |
Publication
Received: 3 May 2018
Revised: 8 January 2019
Accepted: 9 January 2019
Published: 30 December 2019
Proposed: John Lott
Seconded: Ian Agol, Bruce Kleiner
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Authors |
| Antoine Song | |
| Department of Mathematics Princeton University Princeton, NJ United States |
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