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One-dimensional strata of residueless meromorphic differentials

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arxiv 2310.13128 v2 pith:ZGWSBZ6D submitted 2023-10-19 math.AG math.DSmath.GT

classification math.AGmath.DSmath.GT
keywords residuelessstratacomplexcomponentscurvesdifferentialslocusmathcal
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abstract

In projectivized strata of meromorphic $1$-forms on elliptic curves with only one zero, the locus of residueless differentials is a complex curve endowed with a canonical complex projective structure. Drawing on the multi-scale compactification of strata, we provide formulas to compute the genus of these curves and the degree of their natural forgetful map to $\mathcal{M}_{1,1}$. Additionally, we distinguish two non-hyperelliptic components in the residueless locus of the exceptional stratum $\mathcal{H}_{1}(12,-3,-3,-3,-3)$ and hence complete the classification of the connected components of these loci.

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  1. Connected components of generalized strata of meromorphic differentials with residue conditions

    math.AG 2025-04 conditional novelty 8.0 of 10

    Generalized strata of meromorphic differentials with residue conditions are classified by hyperellipticity, ramification profile, spin parity, rotation number, and index.

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