Am Sonntag, 3. August 2008 19:03 schrieb Jason Dusek: > So I guess the Wikipedia page has an error in it? > > http://en.wikipedia.org/wiki/Coproduct#Definition One typo, it must be f_j = f o i_j instead of f_j = i_j o f, apart from that it looks correct. Didn't go through the examples, though, there may be further mistakes.