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On quadratic irrationals with bounded partial quotients

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Abstract

It is shown that for some explicit constants \(c>0, A>0\), the asymptotic for the number of positive non-square discriminants \(D<x\) with fundamental solution \(\varepsilon _D<x^{\frac{1}{2}+\alpha }\), \(0<\alpha <c\), remains preserved if we require moreover \(\mathbb Q(\sqrt{D})\) to contain an irrational with partial quotients bounded by A.

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Correspondence to J. Bourgain.

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Research supported in part by NSF Grants DMS 1301619.

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Bourgain, J. On quadratic irrationals with bounded partial quotients. Sel. Math. New Ser. 24, 2831–2839 (2018). https://doi.org/10.1007/s00029-017-0380-0

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