低熵$\mathbb R^4$中超曲面的水平集流是不断开的
The level set flow of a hypersurface in $\mathbb R^4$ of low entropy does not disconnect
摘要:
我们证明了如果$Σ\subset \mathbb R^4$是一个封闭的、连通的、具有熵的超曲面$λ(Σ)\leq λ(\mathbb{S}^2\times \mathbb R)$,那么$Σ$的水平集流永远不会断开。我们还得到了一个尖锐的版本的前向清除引理的非增肥流$\mathbb R^4$的低熵。
英文摘要:
We show that if $Σ\subset \mathbb R^4$ is a closed, connected hypersurface with entropy $λ(Σ)\leq λ(\mathbb{S}^2\times \mathbb R)$, then the level set flow of $Σ$ never disconnects. We also obtain a sharp version of the forward clearing out lemma for non-fattening flows in $\mathbb R^4$ of low entropy.
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