Crosscap number and knot projections
Crosscap number and knot projections
复制标题
横盖数量和结投影
DOI:
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发表时间:
2018
影响因子:
0.6
通讯作者:
Yusuke Takimura
中科院分区:
文献类型:
--
作者:
N. Ito;Yusuke Takimura
We introduce an unknotting-type number of knot projections that gives an upper bound of the crosscap number of knots. We determine the set of knot projections with the unknotting-type number at most two, and this result implies classical and new results that determine the set of alternating knots with the crosscap number at most two.