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- W2320222014 abstract "We give a log-geometric description of the space of twisted canonical divisors constructed by Farkas--Pandharipande. In particular, we introduce the notion of a principal rubber $k$-log-canonical divisor, and we study its moduli space. It is a proper Deligne--Mumford stack admitting a perfect obstruction theory whose virtual fundamental cycle is of dimension $2g-3+n$. In the so-called strictly meromorphic case with $k=1$, the moduli space is of the expected dimension and the push-forward of its virtual fundamental cycle to the moduli space of stable curves equals the weighted fundamental class of the moduli space of twisted canonical divisors. Conjecturally, it yields a formula of Pixton generalizing the double ramification cycle in the moduli space of stable curves." @default.
- W2320222014 created "2016-06-24" @default.
- W2320222014 creator A5017771260 @default.
- W2320222014 date "2022-07-13" @default.
- W2320222014 modified "2023-09-26" @default.
- W2320222014 title "A generalization of the double ramification cycle via log-geometry" @default.
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