Brauer groups, embedding problems, and nilpotent groups as Galois groups
Article
Received:
Revised:
- 76 Downloads
- 3 Citations
Abstract
Let ℚ ab denote the maximal abelian extension of the rationals ℚ, and let ℚabnil denote the maximal nilpotent extension of ℚ ab . We prove that for every primep, the free pro-p group on countably many generators is realizable as the Galois group of a regular extension of ℚabnil(t). We also prove that ℚabnil is not PAC (pseudo-algebraically closed).
Keywords
Galois Group Solution Field Proper Solution Embedding Problem Profinite Group
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
Preview
Unable to display preview. Download preview PDF.
References
- [AG] M. Auslander and O. Goldman,The Brauer group of a commutative ring, Trans. Amer. Math. Soc.97 (1960), 367–409.CrossRefMathSciNetGoogle Scholar
- [FM] M. Fried and M. Jarden,Field Arithmetic, Springer-Verlag, Berlin, 1986.MATHGoogle Scholar
- [FS] B. Fein and M. Schacher,Brauer groups of rational function fields, in Groupe de Brauer, Lecture Notes in Math.844, Springer-Verlag, Berlin, 1981.Google Scholar
- [FV] M. Fried and H. Völklein,The inverse Galois problem and rational points on modular spaces, Math. Ann.290 (1991), 771–800.MATHCrossRefMathSciNetGoogle Scholar
- [H] K. Hoechsmann,Zum Einbettungsproblem, J. Reine Angew. Math.229 (1968), 81–106.MATHMathSciNetGoogle Scholar
- [J] M. Jarden,Intersections of local algebraic extensions of a Hilbertian field, inGenerators and Relations in Groups and Geometries (A. Barlotti et al., eds.), Kluwer, Dordrecht, 1991.Google Scholar
- [M] B.H. Matzat,Konstruktive Galoistheorie, Lecture Notes in Mathematics1284, Springer-Verlag, Berlin, 1987.MATHGoogle Scholar
- [N] J. Neukirch,Über das Einbettungsproblem der algebraische Zahlentheorie, Inv. Math.21 (1973), 59–116.MATHCrossRefMathSciNetGoogle Scholar
- [Ri] L. Ribes,Introduction of profinite groups and Galois cohomology, Queens Papers in Pure and Applied Math, 1970.Google Scholar
- [Rib] P. Ribenboim,Theorie des Valuations, Sem. Math. Sup., University of Montreal Press, 1968.Google Scholar
- [Se] J.P. Serre,Local Fields, Springer-Verlag, Berlin, 1979.MATHGoogle Scholar
- [Se1] J.P. Serre,Topics in Galois Theory, Lecture notes, Harvard University, 1988.Google Scholar
- [Sh] I.R. Shafarevich, On construction of fields with a given Galois group of order ℓα, Transl. Amer. Math. Soc., Ser. 2,4 (1956), 107–142.Google Scholar
- [So] J. Sonn,On Brauer groups and embedding problems over rational function fields, J. Algebra131 (1990), 631–640.MATHCrossRefMathSciNetGoogle Scholar
- [W] E. Weiss,Algebraic Number Theory, McGraw-Hill, New York, 1963.MATHGoogle Scholar
Copyright information
© Hebrew University 1994