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arXiv 2005.04371math.DSmath.NT
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负连分数的丢番图逼近

Diophantine approximation by negative continued fraction

Hiroaki Ito

摘要:

本文证明了$x$负展开式的$n$次收敛的分母$Q_n$的增长率和逼近率:$$ \frac{\log{n}}{n}\log{\left|x-\frac{P_n}{Q_n}\right|}\rightarrow -\frac{π^2}{3} \quad \text{in measure.} $$对a.e. $x$。在证明过程中,我们重新证明了负连分数的算术平均数在测度上收敛于3,尽管下极限是2,上极限几乎处处是无穷大.

英文摘要:

We show that the growth rate of denominator $Q_n$ of the $n$-th convergent of negative expansion of $x$ and the rate of approximation: $$ \frac{\log{n}}{n}\log{\left|x-\frac{P_n}{Q_n}\right|}\rightarrow -\frac{π^2}{3} \quad \text{in measure.} $$ for a.e. $x$. In the course of the proof, we reprove known inspiring results that arithmetic mean of digits of negative continued fraction converges to 3 in measure, although the limit inferior is 2, and the limit superior is infinite almost everywhere.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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