Product of rings

In mathematics, it is possible to combine several rings into one large product ring. This is done as follows: if I is some index set and R_i is a ring for every i in I, then the cartesian product Π_{i ∈ I} R_i can be turned into a ring by defining the operations coordinate-wise.

单词	Direct sum of rings
释义	Direct sum of rings 英语百科 Product of rings In mathematics, it is possible to combine several rings into one large product ring. This is done as follows: if I is some index set and R_i is a ring for every i in I, then the cartesian product Π_{i ∈ I} R_i can be turned into a ring by defining the operations coordinate-wise.
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Direct sum of rings

Product of rings