3 problems

Let $\mathcal{C}_g$ be the universal curve of genus-$g$ curves and let $\mathcal{J}_g$ be the universal Jacobian. A relation in the tautological ring is an algebraic relation among…

Let $\mathfrak{sl}_2$ act on the tautological algebra associated with the universal Jacobian, and let tautological relations be the relations among tautological classes. Yin's…

Let ${\mathcal{J}_{d,g}}$ be the rigidified universal Jacobian, let ${\mathcal Jac}_{d,g}$ be the corresponding universal Jacobian stack, and let … be the resulting $\mathbb{G}_m$-…