Smoothening cone points with Ricci flow

Details Smoothening cone points with Ricci flow Smoothening cone points with Ricci flow

2011-09-26

arxiv.org/abs/1109.5554v1

Mathematics

Differential Geometry

Scientific paper

We consider Ricci flow on a closed surface with cone points. The main result is: given a (nonsmooth) cone metric g_0 over a closed surface there is a smooth Ricci flow g(t) defined for (0,T], with curvature unbounded above, such that g(t) tends to g_0 as t tends to 0. This result means that Ricci flow provides a way for instantaneously smoothening cone points. We follow an argument of P. Topping modifying his reasoning for cusps of negative curvature; in that sense we can consider cusps as a limiting zero-angle cone, and we generalize to any angle between 0 and 2\pi.

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