A compactification of Igusa varieties
- Creators
- Mantovan, Elena
Abstract
We investigate the notion of Igusa level structure for a one-dimensional Barsotti–Tate group over a scheme X of positive characteristic and compare it to Drinfeld's notion of level structure. In particular, we show how the geometry of the Igusa covers of X is useful for studying the geometry of its Drinfeld covers (e.g. connected and smooth components, singularities). Our results apply in particular to the study of the Shimura varieties considered in Harris and Taylor (On the geometry and cohomology of some simple Shimura varieties. Princeton University Press, Princeton, 2001). In this context, they are higher dimensional analogues of the classical work of Igusa for modular curves and of the work of Carayol for Shimura curves. In the case when the Barsotti–Tate group has constant p-rank, this approach was carried-out by Harris and Taylor (On the geometry and cohomology of some simple Shimura varieties. Princeton University Press, Princeton, 2001).
Additional Information
© 2007 Springer. Received: 28 October 2005 / Revised: 26 June 2007 / Published online: 28 August 2007. The author is very grateful to Richard Taylor and Brian Conrad for their help with all the phases of this project, and to Ben Moonen for his useful comments on an early version of this paper. She is also indebted to the referee for her or his help.Attached Files
Submitted - Igusa.pdf
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Additional details
- Eprint ID
- 56960
- DOI
- 10.1007/s00208-007-0149-4
- Resolver ID
- CaltechAUTHORS:20150424-125450008
- Created
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2015-04-24Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field