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arXiv 1609.07076math.NT
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指数函数在有理点的有理逼近

Rational approximations of the exponential function at rational points

Kalle Leppälä, Tapani Matala-aho, Topi Törmä

摘要:

通过研究$e^{s/t}$的广义连分数展开,给出了量$|e^{s/t}-M/N|$的显式渐近下界.在情形$|s|\geq 3$中,我们通过从该广义连分数的收敛性的分子和子中提取一个大的公共因子来改进已有的结果.

英文摘要:

We give explicit and asymptotic lower bounds for the quantity $|e^{s/t}-M/N|$ by studying a generalized continued fraction expansion of $e^{s/t}$. In cases $|s|\geq 3$ we improve existing results by extracting a large common factor from the numerators and the denominators of the convergents of that generalized continued fraction.

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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