Mapping class group actions on configuration spaces and the Johnson filtration
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Let Fn(Σg,1) denote the configuration space of n ordered points on the surface Σg,1 and let Γg,1 denote the mapping class group of Σg,1. We prove that the action of Γg,1 on Hi(Fn(Σg,1); ℤ) is trivial when restricted to the ith stage of the Johnson filtration J(i) ⊂ Γg,1. We give examples showing that J(2) acts nontrivially on H3(F3(Σg,1)) for g ≥ 2, and provide two new conceptual reinterpretations of a certain group introduced by Moriyama.
Original language | English |
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Journal | Transactions of the American Mathematical Society |
Volume | 375 |
Issue number | 8 |
Pages (from-to) | 5461-5489 |
ISSN | 0002-9947 |
DOIs | |
Publication status | Published - 2022 |
Bibliographical note
Publisher Copyright:
© 2022 American Mathematical Society.
Links
- https://www.ams.org/journals/tran/2022-375-08/S0002-9947-2022-08637-2/home.html
Final published version
ID: 320109940