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Journal of the American Mathematical Society
ISSN: 1088-6834(e) ISSN: 0894-0347(p)
     

Supersimple theories

Author(s): Steven Buechler; Anand Pillay; Frank Wagner
Journal: J. Amer. Math. Soc. 14 (2001), 109-124.
MSC (2000): Primary 03C45
Posted: September 20, 2000
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Abstract | References | Similar articles | Additional information

Abstract:

We prove elimination of hyperimaginaries in supersimple theories. This means that if an equivalence relation on the set of realisations of a complete type (in a supersimple theory) is defined by a possibly infinite conjunction of first order formulas, then it is the intersection of definable equivalence relations.


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Additional Information:

Steven Buechler
Affiliation: Department of Mathematics, University of Notre Dame, Notre Dame, Indiana 46556-5683
Email: buechler.1@nd.edu

Anand Pillay
Affiliation: Department of Mathematics, University of Illinois at Urbana-Champaign, 1409 W. Green Street, Urbana, Illinois 61801
Email: pillay@math.uiuc.edu

Frank Wagner
Affiliation: Mathematical Institute, Oxford University, Oxford, England
Address at time of publication: Institut Girard Desargues (Lyon I), Université Claude Bernard, 43, Boulevard du 11 Novembre 1918, 69622 Villeurbanne-Cedex, France
Email: wagner@desargues.univ-lyon1.fr

DOI: 10.1090/S0894-0347-00-00350-7
PII: S 0894-0347(00)00350-7
Received by editor(s): July 14, 1999
Received by editor(s) in revised form: June 20, 2000
Posted: September 20, 2000
Additional Notes: The first author was supported by an NSF grant. The second author was supported by an NSF grant and thanks MSRI for its hospitality. The third author was supported by DFG grant Wa 899/2-1 and thanks MSRI for its hospitality.
Copyright of article: Copyright 2000, American Mathematical Society


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