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A Belyi map over a field $K$ of characteristic zero is a finite morphism $\phi\colon X\to\mathbb{P}^1$ of (smooth, projective, geometrically irreducible) curves over $K$ that is unramified outside $\{0,1,\infty\}$.

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• Review status: beta
• Last edited by John Voight on 2018-07-18 21:12:26
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