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Strange divisibility in groups and rings

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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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Correspondence to Anton A. Klyachko.

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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

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