The Kudla-Rapoport conjecture at a ramified prime for $U(1, 1)$
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- by Qiao He, Yousheng Shi and Tonghai Yang PDF
- Trans. Amer. Math. Soc. 376 (2023), 2257-2291 Request permission
Abstract:
In this paper, we proved a local arithmetic Siegel-Weil formula for a $U(1, 1)$-Shimura variety at a ramified prime, a.k.a. a Kudla-Rapoport conjecture at a ramified case. The formula needs to be modified from the original Kudla-Rapoport conjecture. In the process, we also give an explicit decomposition of the special divisors of the Rapoport-Zink space of unitary type $(1, 1)$ (Krämer model). A key ingredient is to relate the Rapoport-Zink space to the Drinfeld upper plane.References
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Additional Information
- Qiao He
- Affiliation: Department of Mathematics, University of Wisconsin Madison, Van Vleck Hall, Madison, Wisconsin 5370
- MR Author ID: 1490569
- ORCID: 0000-0001-9273-2687
- Email: qhe36@wisc.edu
- Yousheng Shi
- Affiliation: Department of Mathematics, University of Wisconsin Madison, Van Vleck Hall, Madison, Wisconsin 53706
- ORCID: 0000-0003-4230-9244
- Email: shi58@wisc.edu
- Tonghai Yang
- Affiliation: Department of Mathematics, University of Wisconsin Madison, Van Vleck Hall, Madison, Wisconsin 53706
- MR Author ID: 606823
- Email: thyang@math.wisc.edu
- Received by editor(s): January 26, 2021
- Received by editor(s) in revised form: September 2, 2021, and October 5, 2021
- Published electronically: January 12, 2023
- Additional Notes: The first and the third authors were partially supported by a NSF grant DMS-1762289.
- © Copyright 2023 American Mathematical Society
- Journal: Trans. Amer. Math. Soc. 376 (2023), 2257-2291
- MSC (2020): Primary 11G18, 14G35, 14G40
- DOI: https://doi.org/10.1090/tran/8845
- MathSciNet review: 4557865