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Extending the Double Ramification Cycle using Jacobians. (arXiv:1712.07098v1 [math.AG])
来源于:arXiv
We prove that the extension of the double ramification cycle defined by the
first-named author (using modifications of the stack of stable curves)
coincides with that defined by the last-two named authors (using an extended
Brill-Noether locus on suitable compactified universal Jacobians). In
particular, in the untwisted case we deduce that both of these extensions
coincide with that constructed by Li and Graber-Vakil using a virtual
fundamental class on a space of rubber maps. 查看全文>>