CROWELL'S DERIVED GROUP AND TWISTED POLYNOMIALS
CROWELL'S DERIVED GROUP AND TWISTED POLYNOMIALS
复制标题
CROWELL 的导出群和扭曲多项式
DOI:
10.1142/s0218216506004956
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发表时间:
2005
影响因子:
0.5
通讯作者:
Susan G. Williams
中科院分区:
文献类型:
--
作者:
D. Silver;Susan G. Williams
The derived group of a permutation representation, introduced by Crowell, unites many notions of knot theory. We survey Crowell's construction, and offer new applications. The twisted Alexander group of a knot is defined. Using it, we obtain twisted Alexander polynomials. Also, we extend a well-known theorem of Neuwirth and Stallings giving necessary and sufficient conditions for a knot to be fibered. Virtual Alexander polynomials provide obstructions for a virtual knot that must vanish if the knot has a diagram with an Alexander numbering. The extended group of a virtual knot is defined, and using it a more sensitive obstruction is obtained.
DOI:
--
发表时间:
2005
期刊:
Commentarii Mathematici Helvetici 80
影响因子:
--
作者:
Hiroshi Goda;Teruaki Kitano;Takayuki Morifuji
通讯作者:
Takayuki Morifuji