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Proceedings of the American Mathematical Society
Proceedings of the American Mathematical Society
ISSN 1088-6826(e) ISSN 0002-9939(p)

     

Lifting wreath product extensions

Author(s): Elena V. Black
Journal: Proc. Amer. Math. Soc. 129 (2001), 1283-1288.
MSC (2000): Primary 14H30, 14E20, 14D10; Secondary 12F10, 13B05
Posted: October 24, 2000
MathSciNet review: 1814179
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Abstract | References | Similar articles | Additional information

Abstract:

Let $G$ and $H$ be finite groups and let $K$ be a hilbertian field. We show that if $G$ has a generic extension over $K$ and $H$ satisfies the arithmetic lifting property over $K$, then the wreath product $G\wr H$ of $G$ and $H$ also satisfies the arithmetic lifting property over $K$. Moreover, if the orders of $H$ and $G$ are relatively prime and $G$ is abelian, then any extension of $G$ by $H$(which is necessarily a semidirect product) has the arithmetic lifting property.


References:

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E. Black, Deformation of dihedral $2$-group extensions of fields, Trans. Amer. Math. Soc. 351 (1999), 3229-3241. MR 99m:12004

[Bl2]
E. Black, On semidirect products and the arithmetic lifting property, J. London Math. Soc. (2) 60 (1999), 677-688. CMP 2000:11

[CHR]
S.U. Chase, D.K. Harrison and A. Rosenberg, Galois theory and Galois cohomology of communitive rings, Mem. Amer. Math. Soc. 52 (1965), 15-33. MR 33:4118

[MaMa]
G. Malle and B.H. Matzat, Inverse Galois theory, Springer-Verlag, Berlin-Heidelberg-New York-Tokyo, 1999. CMP 2000:02

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D. Saltman, Generic Galois Extensions and Problems in Field Theory, Advances in Math 43 (1982), 250-283. MR 84a:13007

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J-P. Serre, Topics in Galois theory, Notes written by Henri Darmon, Jones and Bartlett Publ., Boston, 1992. MR 94d:12006


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Additional Information:

Elena V. Black
Affiliation: Department of Mathematics, University of Oklahoma, Norman, Oklahoma 73019
Email: eblack@math.ou.edu

DOI: 10.1090/S0002-9939-00-05797-X
PII: S 0002-9939(00)05797-X
Received by editor(s): August 9, 1999
Posted: October 24, 2000
Communicated by: Michael Stillman
Copyright of article: Copyright 2000, American Mathematical Society




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