1. ## Ring

Let I be any nonempty index set and let $R_i$ be a ring for each i en I. Prove that the direct product is a ring under componentwise addittion and multiplication ( $\prod{} R_i \textrm$ .with i in I)

2. ## Re: Ring

what have you tried?

3. ## Re: Ring

deveno hello, I just finished the exercise, a little long but anyway, thanks anyway .