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The Kodaira dimensions of $\overline{\mathcal{M}}_{22}$ and $\overline{\mathcal{M}}_{23}$

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arxiv 2005.00622 v3 pith:SSNDISWZ submitted 2020-05-01 math.AG

classification math.AG
keywords classeslinearmathcaloverlineseriesvirtualassociatedcalculate
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We prove that the moduli spaces of curves of genus 22 and 23 are of general type. To do this, we calculate certain virtual divisor classes of small slope associated to linear series of rank 6 with quadric relations. We then develop new tropical methods for studying linear series and independence of quadrics and show that these virtual classes are represented by effective divisors.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The Kodaira classification of the moduli space of pointed curves in genus $3$

    math.AG 2025-06 conditional novelty 7.0 of 10

    For n≥15, the moduli space of n-pointed genus-3 curves is of general type, completing the Kodaira classification of pointed genus-3 moduli spaces.

  2. Tropical linear systems and the realizability problem

    math.AG 2025-06 conditional novelty 6.0 of 10

    Local dimension of a tropical linear system is bounded below by its Baker-Norine rank, and the realizable canonical divisors form a tropically convex, definable, closed polyhedral complex.

  3. Tropical geometry in torus bundles

    math.AG 2025-08 conditional novelty 5.0 of 10

    For curves in a torus bundle, the weighted sum of tropical edge directions equals the Chern classes of the bundle line bundles evaluated on the curve's base class.

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