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Polynomial point counts for moduli spaces of curves with marked points

Sam Payne, Thomas Willwacher

Source record

Source: arXiv

Published: Sep 5, 2026

arXiv: 2609.06264

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Source abstract

We prove that the number of curves of a fixed genus g with n marked points over finite fields is a polynomial function of the cardinality of the field if and only if g = 0 or 3g + 2n is less than or equal to 24. This confirms a conjecture of Canning, Larson, and the authors.

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Polynomial point counts for moduli spaces of curves with marked points — Mathematical Frontier Network