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The orbifold Chow ring of toric Deligne-Mumford stacks

Author(s): Lev A. Borisov; Linda Chen; Gregory G. Smith
Journal: J. Amer. Math. Soc. 18 (2005), 193-215.
MSC (2000): Primary 14N35; Secondary 14C15, 14M25
Posted: November 3, 2004
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Abstract: Generalizing toric varieties, we introduce toric Deligne-Mumford stacks. The main result in this paper is an explicit calculation of the orbifold Chow ring of a toric Deligne-Mumford stack. As an application, we prove that the orbifold Chow ring of the toric Deligne-Mumford stack associated to a simplicial toric variety is a flat deformation of (but is not necessarily isomorphic to) the Chow ring of a crepant resolution.

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Additional Information:

Lev A. Borisov
Affiliation: Department of Mathematics, University of Wisconsin, Madison, Wisconsin 53706
Email: borisov@math.wisc.edu

Linda Chen
Affiliation: Department of Mathematics, Columbia University, New York, New York 10027
Address at time of publication: Department of Mathematics, The Ohio State University, 231 W 18th Avenue, Columbus, Ohio 43210
Email: lchen@math.ohio-state.edu

Gregory G. Smith
Affiliation: Department of Mathematics, Barnard College, Columbia University, New York, New York 10027
Address at time of publication: Department of Mathematics and Statistics, Queen's University, Kingston, Ontario K7L 3N6 Canada
Email: ggsmith@mast.queensu.ca

DOI: 10.1090/S0894-0347-04-00471-0
PII: S 0894-0347(04)00471-0
Keywords: Deligne-Mumford stack, Chow ring, toric variety, crepant resolution
Received by editor(s): September 30, 2003
Posted: November 3, 2004
Additional Notes: The first author was partially supported in part by NSF grant DMS-0140172.
The second author was partially supported in part by NSF VIGRE grant DMS-9810750.
Copyright of article: Copyright 2004, American Mathematical Society
The copyright for this article reverts to public domain after 28 years from publication.

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