arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1102.5764math.NT
收藏

有限域中系数代数洛朗级数的有理逼近

Rational approximations to algebraic Laurent series with coefficients in a finite field

Alina Firicel

摘要:

本文给出了有限域上系数代数洛朗级数的无理性指数的一个一般上界。我们的证明是基于一种方法介绍了在不同的框架Adamczewski和Cassaigne。它利用自动机理论,并在我们的上下文中,一个经典的定理,由于克里斯托。然后,我们引入了一种新的方法,使我们能够在许多情况下大大提高这个一般的约束。作为一个例子,我们给出几个例子的代数洛朗级数,我们能够计算的精确值的无理性指数。

英文摘要:

In this paper we give a general upper bound for the irrationality exponent of algebraic Laurent series with coefficients in a finite field. Our proof is based on a method introduced in a different framework by Adamczewski and Cassaigne. It makes use of automata theory and, in our context, of a classical theorem due to Christol. We then introduce a new approach which allows us to strongly improve this general bound in many cases. As an illustration, we give few examples of algebraic Laurent series for which we are able to compute the exact value of the irrationality exponent.

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。

↑