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首页> 外文期刊>Journal of knot theory and its ramifications >Achirality and linking numbers of links
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Achirality and linking numbers of links

机译:关联性和链接数

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An oriented and ordered n-component link L in the 3-sphere is said to be achiral if it is ambient isotopic to its mirror image ignoring orientations and ordering of the components. For an oriented and ordered n-component link L, let λ _L be the product of linking numbers of all 2-component sublinks in L. For n = 4m + 3, where m is a non-negative integer, we show that if L is achiral then λ _L = 0. And for n ≠ 4m + 3, we show that there exists an n-component achiral link L with λ _L ≠ 0 by using achiral embeddings of complete graphs with n vertices K _n.
机译:如果3球中的定向且有序的n成分链L如果不考虑其成分和方向,则在其镜像的周围是同位素,则被称为非手性。对于有序的有序n分量链接L,令λ_L为L中所有2分量子链接的链接数的乘积。对于n = 4m + 3,其中m为非负整数,我们证明如果L是非手性,则λ_L =0。并且对于n≠4m + 3,我们通过使用具有n个顶点K _n的完整图的非手性嵌入,表明存在一个λ_L≠0的n分量非手性链L。

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