Talk:Product of rings

From Wikipedia, the free encyclopedia

Why is it that an ideal in the direct product of a countable number of copies of R is a direct product of ideals in R? Surely, the ideal of sequences that are 0 almost everywhere is a counter-example.

i found this odd also. for reference, in hungerford, algebra p.135, there is an exercise which mentions that R_i must all have unity to fulfill this converse... --Thinkinglex (talk) 08:35, 29 September 2008 (UTC)