Dehn-surgery conjecture for the manifolds at infinity of Δ3,4,∞;n\Delta_{3,4,\infty;n}

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Let Δ3,4,∞;n\Delta_{3,4,\infty;n} be the complex triangle group with parameters 3,4,∞;n3,4,\infty;n, and let its even subgroup be the subgroup considered in the paper. Let m295m295 be the two-cusped hyperbolic 33-manifold in the Snappy Census. The manifold at infinity is the 33-manifold associated with the group's spherical CR uniformization.

Dehn-surgery conjecture. The manifold at infinity of the even subgroup of Δ3,4,∞;n\Delta_{3,4,\infty;n} is the hyperbolic 33-manifold obtained by Dehn surgery on the first cusp of m295m295 with slope n−2n-2.

The case n=∞n=\infty is related to the known identification of the manifold at infinity of the even subgroup of Δ3,4,∞;∞\Delta_{3,4,\infty;\infty} with m295m295. The conjecture predicts that varying nn produces further spherical CR uniformizations through Dehn surgeries on that cusp; the source gives no resolution of the general claim.

References

Primary source

Jiming Ma and Baohua Xie, “Three-manifolds at infinity of complex hyperbolic orbifolds”, arXiv:2205.11167 (2022).

Additional references

2 papers in this index state this conjecture (2019–2022). The statement above is taken from the most recent of them; the others are arXiv:1904.06057.

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