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arxiv: 1904.07520 · v1 · pith:37WDTRM5new · submitted 2019-04-16 · 🧮 math.AG

An action of the Polishchuk differential operator via punctured surfaces

classification 🧮 math.AG
keywords algebraactioncurvesmathfrakoperatorpolishchukpuncturedrelations
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For a family of Jacobians of smooth pointed curves there is a notion of tautological algebra. There is an action of $\mathfrak{sl}_2$ on this algebra. We define and study a lifting of the Polishchuk operator, corresponding to $f\in \mathfrak{sl}_2$, on an algebra consisting of punctured Riemann surfaces. As an application we prove that a collection of tautological relations on moduli of curves, discovered by Faber and Zagier, come from a class of relations on the universal Jacobian.

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