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arXiv 1105.4083math.RT
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半特征多项式,n-模与斜多项式

Semi-characteristic polynomials, ϕ-modules and skew polynomials

Jérémy Le Borgne

摘要:

本文对特征p域上的有限维向量空间的半线性映射引入了半特征多项式的概念,该多项式与线性映射的经典特征多项式具有一些共同的性质。利用这一概念研究了有限域上的斜多项式和线性化多项式,给出了计算有限域上线性化多项式的分裂域的一个算法和有限域上的Galois作用.我们还给出了一种方法来计算斜多项式的最佳界。然后,我们看看斜多项式的因式分解的属性,给出一个计算这些因式分解的几个不变量的映射。我们还解释了如何计算因子分解的数量以及如何找到它们。

英文摘要:

We introduce the notion of semi-characteristic polynomial for a semi-linear map of a finite- dimensional vector space over a field of characteristic p. This polynomial has some properties in common with the classical characteristic polynomial of a linear map. We use this notion to study skew polynomials and linearized polynomials over a finite field, giving an algorithm to compute the splitting field of a linearized polynomial over a finite field and the Galois action on this field. We also give a way to compute the optimal bound of a skew polynomial. We then look at properties of the factorizations of skew polynomials, giving a map that computes several invariants of these factorizations. We also explain how to count the number of factorizations and how to find them all.

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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