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arXiv 2004.05391math.NT
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实二次域的三次和四次扩张中的幂整基

Power integral bases in cubic and quartic extensions of real quadratic fields

István Gaál, László Remete

摘要:

最近,对单整基和幂整基的研究从绝对情形(在Q上)扩展到相对情形(在代数数域上)。以前,在相对情形下,我们只成功地计算了基域为虚二次域的幂整基的生成元。这是第一种情况下,当我们考虑monogenity在更困难的情况下,在扩展的实二次域。本文给出了计算实二次域的三次和四次扩张的幂整基生成元的有效算法,更准确地说是计算三次和四次域与实二次域的复合幂整基生成元的有效算法.在四次域是全复域的情况下,我们给出了一个特别简单的算法。我们用两个详细的例子来说明我们的方法。

英文摘要:

Investigations of monogenity and power integral bases were recently extended from the absolute case (over Q) to the relative case (over algebraic number fields). Formerly, in the relative case we only succeeded to calculate generators of power integral bases when the ground field is an imaginary quadratic field. This is the first case when we consider monogenity in the more difficult case, in extensions of real quadratic fields. We give efficient algorithms for calculating generators of power integral bases in cubic and quartic extensions of real quadratic fields, more exactly in composites of cubic and quartic fields with real quadratic fields. In case the quartic field is totally complex, we present an especially simple algorithm. We illustrate our method with two detailed examples.

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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