# Talk:Product (mathematics)

Jump to: navigation, search
WikiProject Mathematics (Rated B-class, Top-importance)
This article is within the scope of WikiProject Mathematics, a collaborative effort to improve the coverage of Mathematics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
Mathematics rating:
 B Class
 Top Importance
Field: Algebra

## crossproduct

how come cross product isn't mentioned on here? I'd add it, but I don't know where best to classify it under. --128.59.156.77 (talk) 04:38, 26 January 2011 (UTC)

Its listed now. linas (talk) 04:30, 17 April 2012 (UTC)

## the product of two numbers

the product of somthing is the end result 4x4 is 16

16 is the product

Yes it is. It would be nice if this page said the above, more eloquently. ... and if it also explained how to multiply two fractions, the way that the german wikipedia page does .. as well as some other elementary conceptions of products. linas (talk) 04:28, 17 April 2012 (UTC)

The apparent use of the summation symbol Sigma is incongruous with http://en.wikipedia.org/wiki/Mathematical_symbol which follows the usual notation of Sigma for summation and capital Pȉ - Π - for Product. — Preceding unsigned comment added by 86.167.2.38 (talk) 08:58, 8 November 2013 (UTC)

take me out with math ill learn any math i love math but i dont get it — Preceding unsigned comment added by 74.109.43.196 (talk) 22:03, 9 January 2014 (UTC)

## Two pages with the same subject.

The page multiplication covers much of the same topics. Should some parts be moved/merged/deleted? MvH (talk) 19:33, 12 April 2015 (UTC)MvH

Well, no. There is not a lot of overlap, actually. That article has a very different focus: it deals with the more elementary aspects, and it also talks a lot about the different algebraic properties of multiplication. It deals almost exclusively with numbers, making a token mention of groups, in a very shallow way. This article has more of a focus on the products of things that aren't numbers, and introduces some elementary examples thereof.
This article used to simply be a list of the different kinds of products in math, without attempting to describe them in any further detail. I think its useful to have both: an elementary discussion, as well as a listing of the different kinds. I use this article a lot, because I often am thinking about some kind of product whose name I just can't remember ("gee, lets see, was it a wreath product, a smash product or a bouquet of some kind? I don't recall."), so I look it up here. I imagine linear-alg students have the same problem ("what is the difference between an outer product and an inner product and an exterior product?") and need a quick-ref for that.
The section on commutative rings seems inane to me; I can't imagine what it's doing here, or what its trying to say. Naively, I'd say that entire section should be deleted. I mean, yeah, sure, numbers form a ring; they also form a field; algebras have multiplication in them too. So what. 67.198.37.16 (talk) 17:54, 4 September 2015 (UTC)