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Set-theoretic complete intersections on binomials
Author(s):
Margherita
Barile;
Marcel
Morales;
Apostolos
Thoma
Journal:
Proc. Amer. Math. Soc.
130
(2002),
1893-1903.
MSC (2000):
Primary 14M25, 13C40, 14M10
Posted:
December 20, 2001
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Abstract:
Let be an affine toric variety of codimension over a field of any characteristic. We completely characterize the affine toric varieties that are set-theoretic complete intersections on binomials. In particular we prove that in the characteristic zero case, is a set-theoretic complete intersection on binomials if and only if is a complete intersection. Moreover, if are binomials such that , then . While in the positive characteristic case, is a set-theoretic complete intersection on binomials if and only if is completely -glued. These results improve and complete all known results on these topics.
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Additional Information:
Margherita
Barile
Affiliation:
Dipartimento di Matematica, Università degli Studi di Bari, Via Orabona 4, 70125 Bari, Italy
Email:
barile@dm.uniba.it
Marcel
Morales
Affiliation:
Université de Grenoble I, Institut Fourier, UMR 5582, B.P.74, 38402 Saint-Martin D'Hères Cedex, and IUFM de Lyon, 5 rue Anselme, 69317 Lyon Cedex, France
Email:
Marcel.Morales@ujf-grenoble.fr
Apostolos
Thoma
Affiliation:
Department of Mathematics, Purdue Univerity, West Lafayette, Indiana 47907-1395
Address at time of publication:
Department of Mathematics, University of Ioannina, Ioannina 45110, Greece
Email:
athoma@cc.uoi.gr
DOI:
10.1090/S0002-9939-01-06289-X
PII:
S 0002-9939(01)06289-X
Keywords:
Affine semigroups,
binomial ideals,
complete intersections,
set-theoretic complete intersections,
toric varieties
Received by editor(s):
October 17, 2000
Received by editor(s) in revised form:
January 16, 2001
Posted:
December 20, 2001
Communicated by:
Wolmer V. Vasconcelos
Copyright of article:
Copyright
2001,
American Mathematical Society
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