A Note on Heegaard Splittings of Amalgamated 3-Manifolds

Citation:

Kun DU,Xutao GAO.A Note on Heegaard Splittings of Amalgamated 3-Manifolds[J].Chinese Annals of Mathematics B,2011,32(3):475~482
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Authors:

Kun DU; Xutao GAO;

Foundation:

the National Natural Science Foundation of China (No. 10625102).
Abstract: Let $M$ be a compact orientable irreducible 3-manifold, and $F$ be an essential connected closed surface in $M$ which cuts $M$ into two manifolds $M_{1}$ and $M_{2}$. If $M_{i}$ has a minimal Heegaard splitting $M_{i}=V_{i}\cup_{H_{i}}W_{i}$ with $d(H_{1})+d(H_{2})\geq 2(g(M_{1})+g(M_{2})-g(F))+1$, then $g(M)=g(M_{1})+g(M_{2})-g(F)$.

Keywords:

Distance, Stabilization, Strongly irreducible

Classification:

57M25
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