Rozansky-type cyclotomic rationality conjecture for knots

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Let KK be a knot and let d ⁣:N→{0,1,2,…}d\colon \mathbb{N}\to\{0,1,2,\ldots\} vanish except at finitely many elements. Define

ΔKd(t)=∏r∈N, d(r)>0ΔK(tr)2d(r)−1∈Z[t+t−1].\Delta ^d_K(t)=\prod_{r\in\mathbb{N},\,d(r)>0}\Delta _K(t^r)^{2d(r)-1}\in\mathbb{Z}[t+t^{-1}].

Let Λ\Lambda be the cyclotomic completion containing the unified knot invariant JKJ_K, and let Φd(q)\Phi _d(q) be the corresponding cyclotomic ideal element. Rozansky-type rationality conjecture. One has

ΔKd(t)JK∈Z[t+t−1,q,q−1]+Φd(q)Λ.\Delta ^d_K(t)J_K\in \mathbb{Z}[t+t^{-1},q,q^{-1}]+\Phi _d(q)\Lambda.

The source says this conjecture is supported by computer calculations and that it generalizes Rozansky's rationality theorem; it also implies the subsequent root-of-unity rationality conjecture.

References

Primary source

Kazuo Habiro, “A unified Witten-Reshetikhin-Turaev invariant for integral homology spheres”, arXiv:math/0605314 (2006).

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