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arXiv math/0511139math.GT
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多个桥曲面限制结距离

Multiple bridge surfaces restrict knot distance

Maggy Tomova

摘要:

设M是闭不可约可定向三维流形,K是M中的纽结,P和Q是K的桥曲面,且K关于Q不可去。证明了Q与P或$d(K,P) \leq 2-χ(Q-K)$等价.如果K不是二桥纽结,那么即使K相对于Q是可去的,结果也成立。作为一个推论,我们表明,如果一个结在3-球面有高的距离,相对于一些桥球和低的桥数,那么结有一个唯一的最小桥的位置。

英文摘要:

Suppose M is a closed irreducible orientable 3-manifold, K is a knot in M, P and Q are bridge surfaces for K and K is not removable with respect to Q. We show that either Q is equivalent to P or $d(K,P) \leq 2-χ(Q-K)$. If K is not a two bridge knot, then the result holds even if K is removable with respect to Q. As a corollary we show that if a knot in the 3-sphere has high distance with respect to some bridge sphere and low bridge number, then the knot has a unique minimal bridge position.

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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