2 problems

André–Oort conjecture in genus zero. The variety $S$ is $\overline{\mathbb Q}$-bi-algebraic. Furthermore, if not all residues are identically zero on $S$, then the fibers of the re…

Let $\textnormal{S}_{\alpha}$ be a stratum of abelian differentials up to scaling, let $\widetilde{\textnormal{S}_{\alpha}^{\mathrm{an}}}$ be the universal cover of its analytifica…