A note on Hang-Wang's hemisphere rigidity theorem
Let $(M,g)$ be a compact manifold with boundary and $Ric_g\geq (n-1)g$, Hang and Wang proved that $(M,g)$ is isometric to the standard hemisphere if $\partial M$ is convex and isometric to $\mathbb{S}^{n-1}(1)$. We prove some rigidity theorems when $\partial M $ is isometric to a product manifold wh...
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Zusammenfassung: | Let $(M,g)$ be a compact manifold with boundary and $Ric_g\geq (n-1)g$, Hang
and Wang proved that $(M,g)$ is isometric to the standard hemisphere if
$\partial M$ is convex and isometric to $\mathbb{S}^{n-1}(1)$. We prove some
rigidity theorems when $\partial M $ is isometric to a product manifold where
one factor is the standard sphere. |
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DOI: | 10.48550/arxiv.1905.01870 |