Super Markoff-number conjecture for the once-punctured torus

Begin with an oriented triangulation of the once-punctured torus described in the source, and retain ee as a formal variable rather than setting it equal to 11. Iterated flips in all three directions produce all possible arcs in the once-punctured torus. Super Markoff-number conjecture. The super λ\lambda-lengths of these arcs are super analogues of the Markoff numbers and have combinatorial interpretations via double dimer covers of the snake graphs appearing in Section 7 of the cited work, with appropriately specialized μ\mu-invariants. This is proposed as a natural extension of the classical Markoff-number and dimer-cover picture; the source supplies no proof, so its status is open.

Sources & referencesView supporting material

Primary source

Gregg Musiker, Nicholas Ovenhouse and Sylvester W. Zhang, “Double Dimer Covers on Snake Graphs from Super Cluster Expansions”, arXiv:2110.06497 (2021).

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