High distance tangles and tunnel number of knots

High distance tangles and tunnel number of knots
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高距离缠结和隧道节数

DOI:
10.1017/s0305004117000652
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发表时间:
2018
期刊:
Math. Proc. Cambridge Philos. Soc.
影响因子:
--
通讯作者:
Toshio Saito
Toshio Saito
中科院分区:
--
文献类型:
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作者:
Jung Hoon Lee;Toshio Saito;合田洋;Toshio Saito;合田洋;Toshio Saito

文献摘要

相似文献

我们表明,对于任何整数ti大于或等于0 (i = 1,2)和n大于或等于2,在3球中存在一个结点K,具有n-缠结分解K = T1∪T2,使得tnl(ti) = ti (i = 1,2)并且tnl(K) = tnl(T1) + tnl(T2) + 2n−1,其中tnl(⋅)是隧道编号。这包含了对森本提出的未解决问题的肯定回答。
We show that for any integers ti ⩾ 0 (i = 1, 2) and n ⩾ 2, there is a knot K in the 3-sphere with an n-tangle decomposition K = T1∪T2 such that tnl(Ti) = ti (i = 1, 2) and that tnl(K) = tnl(T1) + tnl(T2) + 2n − 1, where tnl(⋅) is the tunnel number. This contains an affirmative answer to an unsolved problem asked by Morimoto.