Alternating-group monodromy conjecture for minimal [1,1]-origamis

From papers

A minimal [1,1][1,1]-origami in H(2g2)\mathcal{H}(2g-2) has 2g12g-1 squares, and its monodromy group is a subgroup of the alternating group on these squares. The [1,1][1,1]-origamis considered in Theorem~ are the minimal [1,1][1,1]-origamis constructed by Aougab-Menasco-Nieland and their generalisations.

Alternating-group monodromy conjecture. All of the [1,1][1,1]-origamis in Theorem~ have monodromy group isomorphic to Alt2g1\operatorname{Alt}_{2g-1}.

The theorem cited in the statement leaves open whether the monodromy group is alternating or projective special linear; this conjecture, based on computer experiments, predicts that the alternating case always occurs. The number of squares, 2g12g-1, lies below the threshold in a result cited by the authors that would force the monodromy group to contain the alternating group.

Progress summary

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Sources & referencesView supporting material

Primary source

Tarik Aougab, Adam Friedman-Brown, Luke Jeffreys and Jiajie Ma, “On the monodromy and spin parity of single-cylinder origamis in the minimal stratum”, arXiv:2502.09498 (2026).

Additional references

2 papers in this index state this conjecture (2024–2025). The statement above is taken from the most recent of them; the others are arXiv:2406.06036.

Solutions 0

No solutions have been posted yet.