Incommensurability conjecture for fully augmented pretzel and rotated links

Let FALPnFALP_n and FALPmFALP_m denote the fully augmented pretzel links with the indicated numbers of regions, and let FALRnFALR_n denote the corresponding rotated fully augmented link. Two hyperbolic link complements are incommensurable when they have no common finite-sheeted cover.

Incommensurability conjecture. The following assertions hold:

FALPn and FALPm are incommensurable for nm.FALP_n\text{ and }FALP_m\text{ are incommensurable for }n\ne m.

For n4n\geq 4,

FALPn and FALRn are incommensurable for all n.FALP_n\text{ and }FALR_n\text{ are incommensurable for all }n.

The claim concerns commensurability distinctions among the link complements studied in the paper. The supplied text proves commensurability of the family FALRnFALR_n with one another, but gives no resolution of these two incommensurability assertions.

Sources & referencesView supporting material

Primary source

Rochy Flint, “Intercusp Geodesics and Cusp Shapes of Fully Augmented Links”, arXiv:1811.07397 (2018).

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