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A 2-continued fraction representation of real numbers and its geometry

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Ukrainian Mathematical Journal Aims and scope

We study the geometry of representations of numbers by continued fractions whose elements belong to the set A 2 = {α1, α2} (A 2-continued fraction representation). It is shown that, for α1α2 ≤ 1/2 , every point of a certain segment admits an A 2-continued fraction representation. Moreover, for α1α2 = 1/2, this representation is unique with the exception of a countable set of points. For the last case, we find the basic metric relation and describe the metric properties of a set of numbers whose A 2-continued fraction representation does not contain a given combination of two elements. The properties of a random variable for which the elements of its A 2-continued fraction representation form a homogeneous Markov chain are also investigated.

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Translated from Ukrains’kyi Matematychnyi Zhurnal, Vol. 61, No. 4, pp. 452–463, April, 2009.

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Dmytrenko, S.O., Kyurchev, D.V. & Prats’ovytyi, M.V. A 2-continued fraction representation of real numbers and its geometry. Ukr Math J 61, 541–555 (2009). https://doi.org/10.1007/s11253-009-0236-7

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  • DOI: https://doi.org/10.1007/s11253-009-0236-7

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