3 problems

Let $C$ be the singular Coble cubic, let $W$ be the associated smooth variety, let $q^*W$ be its indicated $\mathbb{P}^1$-bundle, and let $\Gamma$ be the associated genus-$2$ curve…

Let $C$ be the Coble cubic associated with a congruence of lines in the nine-variable case. Let $\Gamma$ be the genus-$2$ curve appearing in the construction, let $q^*W$ be the ass…

Let $\mathrm{CS}(z)$ be the matrix whose maximal minors define the singular Heisenberg-invariant Coble cubics, and let the four additional equations be the four displayed equations…