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Multivariate Alexander quandles, II. The involutory medial quandle of a link (corrected)
Journal of Knot Theory and Its Ramifications ( IF 0.3 ) Pub Date : 2020-11-26 , DOI: 10.1142/s0218216520500935
Lorenzo Traldi 1
Affiliation  

Joyce showed that for a classical knot [Formula: see text], the involutory medial quandle [Formula: see text] is isomorphic to the core quandle of the homology group [Formula: see text], where [Formula: see text] is the cyclic double cover of [Formula: see text], branched over [Formula: see text]. It follows that [Formula: see text]. In this paper, the extension of Joyce’s result to classical links is discussed. Among other things, we show that for a classical link [Formula: see text] of [Formula: see text] components, the order of the involutory medial quandle is bounded as follows: [Formula: see text] In particular, [Formula: see text] is infinite if and only if [Formula: see text]. We also show that in general, [Formula: see text] is a strictly stronger invariant than [Formula: see text]. That is, if [Formula: see text] and [Formula: see text] are links with [Formula: see text], then [Formula: see text]; but it is possible to have [Formula: see text] and [Formula: see text]. In fact, it is possible to have [Formula: see text] and [Formula: see text].

中文翻译:

多元亚历山大 quandles,II。一个链接的内卷式内侧 quandle(已更正)

乔伊斯证明,对于一个经典的结[公式:见文],对合内侧四合体[公式:见文]同调同调群[公式:见文]的核心四合体,其中[公式:见文]是[公式:见文本]的循环双覆盖,在[公式:见文本]上分支。由此得出[公式:见正文]。在本文中,讨论了乔伊斯的结果对经典链接的扩展。除其他外,我们表明,对于 [公式:参见文本] 组件的经典链接 [公式:参见文本],对合内侧四边形的顺序有界如下: [公式:参见文本] 特别是,[公式: see text] 是无限的当且仅当 [Formula: see text]。我们还表明,一般来说,[Formula: see text] 是比 [Formula: see text] 严格更强的不变量。也就是说,如果 [公式:见正文] 和 [公式:see text] 是与 [Formula: see text],然后是 [Formula: see text] 的链接;但可能有 [公式:见文本] 和 [公式:见文本]。事实上,可以有[公式:见正文]和[公式:见正文]。
更新日期:2020-11-26
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