Abstract:After fixing a pattern $\mathbf{m}$ of zeroes and poles, we introduce a Moduli stack $\Gamma\mathcal{M}_{g,n}^{ex, \mathbf{m}}$ over $\mathbb{F}_p$ that parametrizes smooth marked curves together with a non-zero differential form that is the differential of a meromorphic function. Furthermore, we consider the stack $\mathcal{M}_{g,n}^{ex, \mathbf{m}}$ that parametrizes those divisors on smooth curves that appear as divisors of exact differential forms. By introducing a local-global principle for first order deformations of the objects that we consider, we show smoothness of these stacks and compute their dimension.
From: Matthias Hippold [view email]
[v1]
Wed, 17 Jun 2026 16:20:57 UTC (29 KB)
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