An estimate of the triple point numbers of surface-knots by quandle cocycle invariants

被引:15
|
作者
Hatakenaka, E [1 ]
机构
[1] Tokyo Inst Technol, Dept Math, Meguro Ku, Tokyo 1528550, Japan
关键词
surface-knot; triple point number; quandle cocycle invariant;
D O I
10.1016/j.topol.2003.09.006
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
The triple point number of a surface-knot is defined to be the minimal number of triple points among all diagrams of the surface-knot. We give a lower bound of the triple point number using quandle cocycle invariants. (C) 2003 Published by Elsevier B.V.
引用
收藏
页码:129 / 144
页数:16
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