Coincidence of tagged-triangulation and cluster frieze patterns

Let SS_{\odot} be the punctured disc and let T~\widetilde{\mathcal T} be a tagged triangulation of it. The constructions F(T~)F(\widetilde{\mathcal T}) and Fc(T~)F_c(\widetilde{\mathcal T}) are frieze patterns associated with T~\widetilde{\mathcal T}.

Coincidence conjecture. For every tagged triangulation T~\widetilde{\mathcal T} of SS_{\odot}, the frieze patterns coincide:

F(T~)=Fc(T~).F(\widetilde{\mathcal T})=F_c(\widetilde{\mathcal T}).

The preceding theorem proves the assertion when the cluster corresponds to a slice, and the conjecture extends this agreement to every tagged triangulation of the punctured disc.

Sources & referencesView supporting material

Primary source

Karin Baur and Bethany Marsh, “Ptolemy relations for punctured discs”, arXiv:0711.1443 (2007).

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