Branched covering surface-knots with degree three have the simplifying numbers less than three
Branched covering surface-knots with degree three have the simplifying numbers less than three
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三级分支覆盖表面结的简化数小于三
DOI：
10.1016/j.topol.2019.01.011
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发表时间：
2019
影响因子：
0.6
通讯作者：
Inasa Nakamura
中科院分区：
文献类型：
--
作者：
Takefumi Kondo;Tetsu Toyoda,Takato Uehara;近藤 剛史;近藤 剛史;近藤 剛史;近藤 剛史;近藤 剛史;近藤 剛史;近藤 剛史;Inasa Nakamura;近藤 剛史;近藤 剛史;Inasa Nakamura
分支覆盖面结是一个面结，其形式为覆盖在面结上的分支覆盖。对于一个分支覆盖面-纽结，我们有一个数值不变量，称为简化数。我们证明了三次分枝覆盖曲面-纽结的化简数小于三。
A branched covering surface-knot is a surface-knot in the form of a branched covering over a surface-knot. For a branched covering surface-knot, we have a numerical invariant called the simplifying number. We show that branched covering surface-knots with degree three have the simplifying numbers less than three.