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A motivic circle method

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arxiv 2304.09645 v2 pith:4VBXLDWD submitted 2023-04-19 math.AG math.NT

classification math.AGmath.NT
keywords methodcirclehypersurfacesmodulirationalspacesversionallows
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The circle method has been successfully used over the last century to study rational points on hypersurfaces. More recently, a version of the method over function fields, combined with spreading out techniques, has led to a range of results about moduli spaces of rational curves on hypersurfaces. In this paper a version of the circle method is implemented in the setting of the Grothendieck ring of varieties. This allows us to approximate the classes of these moduli spaces directly, without relying on point counting, and leads to a deeper understanding of their geometry.

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  1. Terminal singularities of the moduli space of curves on low degree hypersurfaces and the circle method

    math.AG 2024-12 conditional novelty 8.0 of 10

    For large ambient dimension n and curve degree e, the moduli space of genus g degree e maps into a smooth degree d hypersurface has at worst terminal singularities.

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