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arXiv 1107.2127math.GT
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Heegaard分裂公共稳定化的一个上界

An upper bound on common stabilizations of Heegaard splittings

Jesse Johnson

摘要:

我们证明了对于同一个3-流形,对亏格$p$和亏格$q$的任意两个Heegaard分裂,亏格至多在3/2 p +2 q- 1处有一个公共的稳定性.我们可以把这与最近的Heegaard分裂的例子相比较,Heegaard分裂的最小公共稳定化至少有$p+q$或$p + 1/2 q$的亏格,这取决于等价的概念。

英文摘要:

We show that for any two Heegaard splittings of genus $p$ and $q$ for the same closed 3-manifold, there is a common stabilization of genus at most 3/2 p + 2q - 1. One may compare this to recent examples of Heegaard splittings whose smallest common stabilizations have genus at least $p+q$ or $p + 1/2 q$ depending on the notion of equivalence.

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