Direct sum of modules: Revision history

27 February 2026

• curprev 05:2205:22, 27 February 2026 imported>Ebony Jackson 20,718 bytes +20,718 →Direct sum of modules with additional structure: It is simply wrong to say that Wedderburn's "direct product" is a coproduct in general - Wedderburn's "direct product" is what modern authors call the tensor product whether commutative or not, and this is not the coproduct in the noncommutative case. Most of what was written in the deleted text has little relevance to an article on direct sums of modules; moreover, it is well covered elsewhere on Wikipedia.