A note on semi-regular continued fractions with bounded partial quotients


Kadyrov S. Kazin A. Duisen S.
2026Springer Science and Business Media Deutschland GmbH

Arabian Journal of Mathematics
2026

This paper explores Diophantine approximation and its connection to continued fractions. A number is called “badly approximable” if its regular continued fraction expansion has bounded partial quotients. These numbers have interesting geometric properties, such as full Hausdorff dimension but zero Lebesgue measure. We extend this idea to semi-regular continued fractions, a variation that uses a sequence of signs to modify the representation. We define σ-badly approximable numbers as those with bounded partial quotients in a semi-regular continued fractions for a fixed sequence of signs σ. This leads us to investigate the fractal properties of such numbers.



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Department of General Education, New Uzbekistan University, Tashkent, Uzbekistan
Department of Mathematics and Natural Sciences, SDU University, Kaskelen, Kazakhstan

Department of General Education
Department of Mathematics and Natural Sciences

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