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For any integer $g > 1$, the automorphism group of any curve of genus $g$ over $\C$ has order at most $84(g-1)$. This is not best possible for every $g$, but there do exist infinitely many $g$ for which the bound is achieved; examples include Klein's quartic curve ($g=3$) and the Fricke-Macbeath curve ($g=7$). See also Wikipedia.

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• Review status: beta
• Last edited by Kiran S. Kedlaya on 2020-09-21 12:08:45
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