A Belyi map corresponds to a finite index subgroup of a triangle group $\Delta(a,b,c)$. The geometry type of a Belyi map is spherical, Euclidean, or hyperbolic according to $\frac{1}{a}+\frac{1}{b}+\frac{1}{c}$ being $>1$, $=1$, or $<1$, respectively.
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- Last edited by John Jones on 2023-08-15 17:51:10
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- 2023-08-15 17:51:10 by John Jones (Reviewed)
- 2019-10-04 12:54:22 by Sam Schiavone
- 2018-07-18 18:30:30 by Michael Musty