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Moduli of genus one curves with two marked points as a weighted blow-up (2109.06451v2)
Published 14 Sep 2021 in math.AG
Abstract: We give an explicit description of $\overline{\mathcal{M}}{1,2}$ as a weighted blow-up of a weighted projective stack. We use this description to compute the Brauer group of $\overline{\mathcal{M}}{1,2;S}$ over any base scheme $S$ where 6 is invertible, and the integral Chow rings of $\overline{\mathcal{M}}{1,2}$ and $\mathcal{M}{1,2}$.
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