A Note on Wu-Zheng's Splitting Conjecture

Details A Note on Wu-Zheng's Splitting Conjecture A Note on Wu-Zheng's Splitting Conjecture

2011-09-12

arxiv.org/abs/1109.2504v1

Mathematics

Differential Geometry

Scientific paper

Cao's splitting theorem says that for any complete K\"ahler-Ricci flow $(M,g(t))$ with $t\in [0,T)$, $M$ simply connected and nonnegative bounded holomorphic bisectional curvature, $(M,g(t))$ is holomorphically isometric to $\C^k\times (N,h(t))$ where $(N,h(t))$ is a Kahler-Ricci flow with positive Ricci curvature for $t>0$. In this article, we show that $k=n-r$ where $r$ is the Ricci rank of the initial metric. As a corollary, we also confirm a splitting conjecture of Wu-Zheng when curvature is assumed to be bounded.

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