Open Access
January 2020 The Ricci flow on the sphere with marked points
D. H. Phong, Jian Song, Jacob Sturm, Xiaowei Wang
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J. Differential Geom. 114(1): 117-170 (January 2020). DOI: 10.4310/jdg/1577502023
Abstract

The Ricci flow on the $2$-sphere with marked points is shown to converge in all three stable, semi-stable, and unstable cases. In the stable case, the flow was known to converge without any reparametrization, and a new proof of this fact is given. The semistable and unstable cases are new, and it is shown that the flow converges in the Gromov–Hausdorff topology to a limiting metric space which is also a $2$-sphere, but with different marked points and, hence, a different complex structure. The limiting metric is the unique conical constant curvature metric in the semi-stable case, and the unique conical shrinking gradient Ricci soliton metric in the unstable case.

Phong, Song, Sturm, and Wang: The Ricci flow on the sphere with marked points
Copyright © 2020 Lehigh University
D. H. Phong, Jian Song, Jacob Sturm, and Xiaowei Wang "The Ricci flow on the sphere with marked points," Journal of Differential Geometry 114(1), 117-170, (January 2020). https://doi.org/10.4310/jdg/1577502023
Received: 21 December 2016; Published: January 2020
Vol.114 • No. 1 • January 2020
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