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Arithmetic diagonal cycles on unitary Shimura varieties

Published online by Cambridge University Press:  27 October 2020

M. Rapoport
Affiliation:
Mathematisches Institut der Universität Bonn, Endenicher Allee 60, 53115Bonn, [email protected] Department of Mathematics, University of Maryland, College Park, MD20742, USA
B. Smithling
Affiliation:
Department of Mathematics, University of Maryland, College Park, MD20742, [email protected]
W. Zhang
Affiliation:
Department of Mathematics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA02139, [email protected]

Abstract

We define variants of PEL type of the Shimura varieties that appear in the context of the arithmetic Gan–Gross–Prasad (AGGP) conjecture. We formulate for them a version of the AGGP conjecture. We also construct (global and semi-global) integral models of these Shimura varieties and formulate for them conjectures on arithmetic intersection numbers. We prove some of these conjectures in low dimension.

Type
Research Article
Copyright
Copyright © The Author(s) 2020

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