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arXiv 1510.04497math.CTmath.RA
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半阿贝尔范畴中的加权算子

Weighted commutators in semi-abelian categories

Marino Gran, George Janelidze, Aldo Ursini

摘要:

我们引入了新的加权中心性和加权交换子的概念,它们与Smith换位子理论中的同余和交换子的中心性概念相对应。子交换子的Huq交换子和Smith交换子的Pedicchio范畴推广都是我们加权交换子的特殊情况,实际上我们分别取最小和最大的权来得到它们.在最后的文件,我们简要地考虑了普遍的代数背景下与旧的工作的第三作者的理想理论版本的换向器理论。

英文摘要:

We introduce new notions of weighted centrality and weighted commutators corresponding to each other in the same way as centrality of congruences and commutators do in the Smith commutator theory. Both the Huq commutator of subobjects and Pedicchio's categorical generalization of Smith commutator are special cases of our weighted commutators; in fact we obtain them by taking the smallest and the largest weight respectively. At the end of the paper we briefly consider the universal-algebraic context in connection with an older work of the third author on the ideal theory version of the commutator theory.

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