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arXiv 2003.11594math.NT
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有理系数洛朗级数在1/T中的马氏谱和拉格朗日谱

Markov and Lagrange Spectra for Laurent series in 1/T with rational coefficients

Nikoleta Kalaydzhieva

摘要:

形式洛朗级数的领域是实数的自然模拟,数学家们一直在将关于有理逼近的著名结果翻译到该设置。在有理数幂级数的框架下,定义并研究了与无理数的丢番图逼近有关的Lagrange谱和与不定二元二次型表示有关的Markov谱.我们计算这两个光谱明确,并表明,他们一致,并没有表现出差距,相反,发生在现实。

英文摘要:

The field of formal Laurent series is a natural analogue of the real numbers, and mathematicians have been translating well-known results about rational approximations to that setting. In the framework of power series over the rational numbers, we define and study the Lagrange spectrum, related to Diophantine approximation of irrationals, and the Markov spectrum, related to representation by indefinite binary quadratic forms. We compute both spectra explicitly, and show that they coincide and exhibit no gaps, contrary to what happens over the reals.

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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