Abstract
We prove a general divisibility theorem that implies, e.g., that, in any group, the number of generating pairs (as well as triples, etc.) is a multiple of the order of the commutator subgroup. Another corollary says that, in any associative ring, the number of Pythagorean triples (as well as four-tuples, etc.) of invertible elements is a multiple of the order of the multiplicative group.
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References
K. S. Brown, The coset poset and probabilistic zeta function of a finite group, J. Algebra 225 (2000), 989–1012.
D. J. Collins, Generating sequences of finite group, Senior Thesis, Cornell University Mathematics Department, 2010. http://www.math.cornell.edu/m/sites/default/files/imported/Research/SeniorTheses/2010/collinsThesis.pdf. (accessed January 1 2017).
P. Hall, The Eulerian functions of a group, Quart. J. Math. Oxford Ser. 7 (1936), 134–151.
T. Hawkes, I. M. Isaacs, and M. Özaydin, On the Möbius function of a finite group, Rocky Mountain J. Math. 19 (1984), 1003–1034.
C. Gordon and F. Rodriguez-Villegas, On the divisibility of #\({\rm {Hom}}(\Gamma , G)\) by \(|G|\), J. Algebra 350 (2012), 300–307.
A. A. Klyachko and A. A. Mkrtchyan, How many tuples of group elements have a given property? With an appendix by Dmitrii V. Trushin, Int. J. Algebra Comp. 24 (2014), 413–428.
C. Kratzer and J. Thévenaz, Fonction de Möbius d’un groupe fini et anneau de Burnside, Comment. Math. Helv. 59 (1984), 425–438.
L. Solomon, The solutions of equations in groups, Arch. Math. 20 (1969), 241–247.
R. A. Wilson, The finite simple groups. graduate texts in mathematics, Springer, 251, London, 2009.
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The work of A. A. Klyachko was supported by the Russian Foundation for Basic Research, Project No. 15-01-05823.
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Klyachko, A.A., Mkrtchyan, A.A. Strange divisibility in groups and rings. Arch. Math. 108, 441–451 (2017). https://doi.org/10.1007/s00013-016-1008-x
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DOI: https://doi.org/10.1007/s00013-016-1008-x