The finite-quandle separation conjecture for knot symmetry classes

Let G\mathcal G be the group generated by reversal and mirror operations on knots, and let K\mathcal K be a finite set of knots closed under the action of G\mathcal G. For a finite sequence of finite quandles S=(Q1,,Qn)\mathcal S=(Q_1,\ldots,Q_n), define

C(K)=(ColQ1(K),ColQ2(K),,ColQn(K)).C(K)=\bigl(\operatorname{Col}_{Q_1}(K),\operatorname{Col}_{Q_2}(K),\ldots,\operatorname{Col}_{Q_n}(K)\bigr).

Finite-quandle separation conjecture. There exists such a sequence S\mathcal S satisfying, for all K,KKK,K'\in\mathcal K,

C(K)=C(K)if and only ifK=K or K=mr(K).C(K')=C(K)\quad\text{if and only if}\quad K'=K\text{ or }K'=mr(K).

The weaker implication that equal coloring vectors force G(K)=G(K)\mathcal G(K')=\mathcal G(K) is also stated. The authors verify these claims computationally for various finite knot sets, including knots with at most 12 crossings, but the general finite-set assertion remains open.

Sources & referencesView supporting material

Primary source

W. Edwin Clark, Mohamed Elhamdadi, Masahico Saito and Timothy Yeatman, “Quandle Colorings of Knots and Applications”, arXiv:1312.3307 (2014).

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