Metaplectic link invariants
Metaplectic link invariants
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Metaplectic 链接不变量
DOI:
10.1007/bf00147477
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发表时间:
1989
影响因子:
0.5
通讯作者:
V. Jones
中科院分区:
文献类型:
--
作者:
D. Goldschmidt;V. Jones
It is well known I-1,(2.1)] that every oriented link in R 3 is isotopic to a closed braid. If~ is a braid, we denote its' closure'(ie the corresponding oriented link) by~. A theorem of Markov [-1,(2.3)] gives necessary and sufficient conditions for two braids to have isotopic closures. Using this result, we construct complex-valued functions w (~) such that w (00= w (fl) whenever~----fl, thereby obtaining a set of invariants for oriented links. More precisely, let B,+ x be the Artin Braid group on n+ 1 strings with generators a 1, o2,..., on satisfying the relations aiai+ l~ i~-ai+ l (Tiai+ l (1~< i< n) aiaj= ajai(1i-Jl/> 2).