Corpus ID: 236469552

Boundary slopes for the Markov ordering on relatively prime pairs

  title={Boundary slopes for the Markov ordering on relatively prime pairs},
  author={Jonah Gaster},
Following McShane, we employ the stable norm on the homology of the modular torus to investigate the Markov ordering on the set of relatively prime integer pairs (q, p) with q ≥ p ≥ 0. Our main theorem is a characterization of slopes along which the Markov ordering is monotone with respect to q, confirming conjectures of Lee-Li-Rabideau-Schiffler that refine conjectures of Aigner. The main tool is an explicit computation of the slopes at the corners of the stable norm ball for the modular torus… Expand

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