Three-manifolds of positive Ricci curvature and convex weakly umbilic boundary

Details Three-manifolds of positive Ricci curvature and convex weakly umbilic boundary Three-manifolds of positive Ricci curvature and convex weakly umbilic boundary

2007-04-17

arxiv.org/abs/0704.2081v1

Mathematics

Differential Geometry

14 pages

Scientific paper

In this paper we consider three-manifolds with weakly umbilic boundary (the Second Fundamental form of the boundary is a constant multiple of the metric). We show that if the initial manifold has positive Ricci curvature and the boundary is convex (nonnegative Second Fundamental form), its metric can be deformed via the Ricci flow to a metric of constant curvature and totally geodesic boundary.

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