The amalgamation of high distance Heegaard splittings is always efficient

The amalgamation of high distance Heegaard splittings is always efficient
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DOI:
10.1007/s00208-008-0214-7
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发表时间:
2008-02
影响因子:
1.4
通讯作者:
Tsuyoshi Kobayashi;Ruifeng Qiu
Tsuyoshi Kobayashi;Ruifeng Qiu
中科院分区:
数学2区
文献类型:
--
作者:
Tsuyoshi Kobayashi;Ruifeng Qiu

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设M是紧致可定向流形,F是将M切为两个3-流形M1和M2的本质闭曲面。设i = 1,2的Heegaard分裂。我们用byd(Si)表示距离。若fd(S1),d(S2)≥ 2(g(M1)+g(M2)−g(F)),则M有唯一的极小Heegaard分裂到合痕,即与的合并.
LetMbe a compact orientable manifold, andFbe an essential closed surface which cutsMinto two 3-manifoldsM1andM2. Letbe a Heegaard splitting fori= 1, 2. We denote byd(Si) the distance of. Ifd(S1),d(S2) ≥  2(g(M1) +g(M2) −g(F)), thenMhas a unique minimal Heegaard splitting up to isotopy, i.e. the amalgamation ofand.