环直积[Ring Direct Product] - 达人(其实～我是卧底，来自外星)

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2005/07/26 | 环直积[Ring Direct Product]
类别(∑〖数学〗) | 评论(0) | 阅读(38) | 发表于 20:46: The direct product of the rings , for some index set , is the set

The ring direct product is confusingly also called the complete direct sum (Herstein 1968).

The ring direct product, like the group direct product, has the universal property that if any ring has a homomorphism to and a homomorphism to , then these homomorphisms factor through in a unique way.; 0