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Convergent Sequences in Discrete Groups

Published online by Cambridge University Press:  20 November 2018

Andreas Thom*
Affiliation:
Universit¨at Leipzig, Germany e-mail: [email protected]
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Abstract

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We prove that a finitely generated group contains a sequence of non-trivial elements that converge to the identity in every compact homomorphic image if and only if the group is not virtually abelian. As a consequence of the methods used, we show that a finitely generated group satisfies Chu duality if and only if it is virtually abelian.

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 2013

References

[1] Alperin, R. C., An elementary account of Selberg's lemma. Enseign. Math. (2) 33(1987), no. 34. 269273. Google Scholar
[2] Chu, H., Compactification and duality of topological groups. Trans. Amer. Math. Soc. 123(1966), 310324. http://dx.doi.org/10.1090/S0002-9947-1966-0195988-5 Google Scholar
[3] Comfort, W.W., S. Hernández, Remus, D., and Trigos-Arrieta, F. J., Some open questions on topological groups. In: Nuclear groups and Lie groups (Madrid, 1999), Res. Exp. Math., 24, Heldermann, Lemgo, 2001, pp. 5776. Google Scholar
[4] Gamburd, A., Jakobson, D., and Sarnak, P., Spectra of elements in the group ring of SU(2). J. Eur. Math. Soc. (JEMS) 1(1999), no. 1, 5185. http://dx.doi.org/10.1007/PL00011157 Google Scholar
[5] Gerstenhaber, M. and Rothaus, O. S., The solution of sets of equations in groups. Proc. Nat. Acad. Sci. U.S.A. 48(1962), 15311533. http://dx.doi.org/10.1073/pnas.48.9.1531 Google Scholar
[6] Glicksberg, I., Uniform boundedness for groups. Canad. J. Math. 14(1962), 269276. http://dx.doi.org/10.4153/CJM-1962-017-3 Google Scholar
[7] Hausdorff, F., Bemerkung ¨uber den Inhalt von Punktmengen. Math. Ann. 75(1914), no. 3, 428433. http://dx.doi.org/10.1007/BF01563735 Google Scholar
[8] Hernández, S., The Bohr topology of discrete nonabelian groups. J. Lie Theory 18(2008), no. 3, 733746. Google Scholar
[9] Hernández, S. and T.-S.Wu, Some new results on the Chu duality of discrete groups. Monatsh. Math. 149(2006), no. 3, 215232. http://dx.doi.org/10.1007/s00605-006-0382-z Google Scholar
[10] Hewitt, E. and Ross, K. A., Abstract harmonic analysis. Vol. II: Structure and analysis for compact groups. Analysis on locally compact Abelian groups. Die Grundlehren der mathematischen Wissenschaften, 152, Springer-Verlag, New York, 1970.Google Scholar
[11] Heyer, H., Groups with Chu duality. In: Probability and information theory, II, Lecture Notes in Math., 296, Springer, Berlin, 1973, pp. 181215. Google Scholar
[12] Jordan, C., Mémoire sur les équations différentielles linéaires a intégrale algébrique. J. Reine angew. Math. 1878(1878), no. 84, 89215. Google Scholar
[13] Kaloshin, V. and Rodnianski, I., Diophantine properties of elements of SO(3). Geom. Funct. Anal. 11(2001), no. 5, 953970. http://dx.doi.org/10.1007/s00039-001-8222-8 Google Scholar
[14] Leptin, H., Abelsche Gruppen mit kompakten Charaktergruppen und Dualit¨atstheorie gewisser linear topologischer abelscher Gruppen. Abh. Math. Sem. Univ. Hamburg 19(1955), 244263. http://dx.doi.org/10.1007/BF02988875 Google Scholar
[15] Tits, J., Free subgroups in linear groups. J. Algebra 20(1972), 250270. http://dx.doi.org/10.1016/0021-8693(72)90058-0 Google Scholar