Abstract
It is proved that, for a (closed) subgroupH of a free profinite or free prosolvable groupF of rankF>1 such thatH contains a nontrivial composition subgroupN ofF, we have rankF<∞ and [F:H]<∞.
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References
A. Karrass and D. Solitar, “On finitely generated subgroups of a free group,”Proc. Amer. Math. Soc.,22, No. 1, 209–213 (1969).
O. V. Mel'nikov, “Characterization of accessible subgroups of free profinite groups,”Dokl. Akad. Nauk BSSR,22, No. 8, 677–680 (1978).
O. V. Mel'nikov, “Normal divisors of free profinite groups,”Izv. Akad. Nauk SSSR Ser. Mat. [Math. USSR-Izv.],42, No. 1, 3–25 (1978).
A. Lubotzky, “Combinatorial group theory for pro-p-groups,”J. Pure Appl. Algebra,25, 311–325 (1982).
K. Hoechsmann, “Zum Einbettungsproblem,”J. Reine Angew. Math.,229, 81–106 (1968).
K. Uchida, “Separably Hilbertian fields,”Kodai Math. J.,3, No. 1, 83–95 (1980).
M. D. Fried and M. Jarden,Field Arithmetic, Springer, Berlin (1986).
W. Kuyk, “Extensions de corps hilbertiens,”J. Algebra,14, No. 1, 112–124 (1970).
E. Binz, J. Neukirch, and G. H. Wenzel, “A subgroup theorem for free products of profinite groups,”J. Algebra,19, No. 1, 104–109 (1971).
W. Gaschütz, “Zu einem von B. H. und H. Neumann gestellten Problem,”Math. Nachr.,14, No. 4–6, 249–252 (1955).
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Translated fromMatematicheskie Zametki, Vol. 64, No. 1, pp. 95–106, July, 1998.
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Mel'nikov, O.V. Finitely generated subgroups of free profinite groups and of some Galois groups. Math Notes 64, 82–91 (1998). https://doi.org/10.1007/BF02307198
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DOI: https://doi.org/10.1007/BF02307198