[2B0]Note that Hurwitz’s theorem [ 31 ] states that for every irrational number \(𝜉\) there are infinitely many coprime integers \(m, n∈ℤ\) such that
\[ \left|𝜉 -{\frac{m}{n}}\right|{\lt}{\frac{1}{{\sqrt{5}}\, n^{2}}}. \]
[2B0]Note that Hurwitz’s theorem [ 31 ] states that for every irrational number \(𝜉\) there are infinitely many coprime integers \(m, n∈ℤ\) such that