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从交换有理代数中的满格得到半群

Semigroups from full lattices in commutative ${\mathbb Q}$-algebras

Universität Mannheim(曼海姆大学)

Claus Hertling, Khadija Larabi

AI总结:

本文研究了交换有理代数中满格构成的半群及其商半群,扩展了乔丹-扎森豪斯定理,并探讨了其在正交群共轭类中的应用。

摘要:

有限维交换有理代数中的满格构成一个交换半群。在数域的情况下,某个商半群的顶部部分是类群。对于可分离代数,一些基本结果,特别是乔丹-扎森豪斯定理,已知适用于该商半群。本文还考虑了非可分离代数的情况。它研究了此类代数中的交换满格半群以及商半群。这在交换但不可分离的情况下导致了乔丹-扎森豪斯定理的某种扩展。一个应用涉及正交群GL_n(Z)的正则整数n×n矩阵共轭类。

英文摘要:

The full lattices in a finite dimensional commutative ${\mathbb Q}$-algebra form a commutative semigroup. In the case of an algebraic number field the top part of a certain quotient semigroup is the class group. For a separable algebra some basic results, especially the Jordan-Zassenhaus theorem, are known for this quotient semigroup. This paper considers also algebras which are not separable. It studies the commutative semigroup of full lattices in such an algebra and also the quotient semigroup. This leads in this commutative, but not separable situation to a certain extension of the Jordan-Zassenhaus theorem. One application concerns $GL_n({\mathbb Z})$-conjugacy classes of regular integer $n\times n$ matrices.

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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