Talk:Transpose of Matrix Product

In the last step, are we assuming $\circ$ is commutative? If yes, how do we know? If not, how did we prove the theorem? --GFauxPas 19:43, 23 February 2012 (EST)
 * Good call, I'd never noticed that. I have restricted our theorem to apply exactly that condition. This becomes important in the study of Lie groups (which I keep promising myself I'm going to try to get my head round). --prime mover 02:10, 24 February 2012 (EST)
 * I don't know what those are, but at my level, rather than trying to research it, it's best to let sleeping groups lie. (sorry) --GFauxPas 08:34, 24 February 2012 (EST)
 * I'm taking a course on Lie groups at the moment; pm, I figure it's nice to have someone knowledgeable to verify what is put up. Lie groups are a long stretch from where you (GFP) are at the moment. It is very advisable to first take a course in both differential geometry and group theory (it's on the intersection of these fields). --Lord_Farin 08:48, 24 February 2012 (EST)