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arXiv math/9802101math.GT
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可定向三维流形的Heegaard结构与JSJ结构的比较

Comparing Heegaard and JSJ structures of orientable 3-manifolds

Martin Scharlemann, Jennifer Schultens

摘要:

不可约闭可定向3-流形的Heegaard亏格g限制了流形通过其标准环面的E-Shalen-Johannson分解中出现的块的数量和复杂性。例如,如果p个互补组分不是塞弗特纤维化的,则p < g。这一结果推广了Kobayashi的工作。Heegaard亏格g也对塞弗特块的复杂性给出了明确的界限。例如,如果Seifert片的底空间的并具有欧拉示性数X,且Seifert片中共有f个例外纤维,则f-X不大于3g - 3 -p.

英文摘要:

The Heegaard genus g of an irreducible closed orientable 3-manifold puts a limit on the number and complexity of the pieces that arise in the Jaco-Shalen-Johannson decomposition of the manifold by its canonical tori. For example, if p of the complementary components are not Seifert fibered, then p < g. This result generalizes work of Kobayashi. The Heegaard genus g also puts explicit bounds on the complexity of the Seifert pieces. For example, if the union of the base spaces of the Seifert pieces has Euler characteristic X and there are a total of f exceptional fibers in the Seifert pieces, then f - X is no greater than 3g - 3 - p.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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