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arXiv 1602.05463math.NT
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接近于$1$的有理数的实根和$p$ -adic根的有效无理性测度及其在Thue-Mahler方程参数族中的应用

Effective irrationality measures for real and $p$-adic roots of rational numbers close to $1$, with an application to parametric families of Thue-Mahler equations

Yann Bugeaud

摘要:

我们展示了如何在两个矩阵的线性型的理论允许一个得到有效的PDMATHAMM次根的有理数${a \over b}$的非理性措施,当$a$是非常接近$b$。我们给出了一个$p$ -adic模拟这个结果的假设下,$a$是$p$ -adically非常接近$b$,也就是说,一个大的权力$p$除$a-b$。作为应用,我们完全解决某些家庭的Thue-Mahler方程。我们的结果说明,诚然在一个非常特殊的情况下,强度已知的估计线性型的矩阵。

英文摘要:

We show how the theory of linear forms in two logarithms allows one to get effective irrationality measures for $n$-th roots of rational numbers ${a \over b}$, when $a$ is very close to $b$. We give a $p$-adic analogue of this result under the assumption that $a$ is $p$-adically very close to $b$, that is, that a large power of $p$ divides $a-b$. As an application, we solve completely certain families of Thue-Mahler equations. Our results illustrate, admittedly in a very special situation, the strength of the known estimates for linear forms in logarithms.

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