ON VASSILIEV INVARIANTS OF ORDER TWO FOR STRING LINKS
ON VASSILIEV INVARIANTS OF ORDER TWO FOR STRING LINKS
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关于字符串链接的二阶 VASSILIEV 不变量
DOI:
10.1142/s0218216505003993
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发表时间:
2004
影响因子:
0.5
通讯作者:
Jean
中科院分区:
文献类型:
--
作者:
Jean
We show that the Casson knot invariant, linking number and Milnor's triple linking number, together with a certain 2-string link invariant V2, are necessary and sufficient to express any string link Vassiliev invariant of order two. Explicit combinatorial formulas are given for these invariants. This result is applied to the theory of claspers for string links.