Talk:Join (mathematics)

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Mathematics Portal This article is within the scope of WikiProject Mathematics, which collaborates on articles related to mathematics.
Mathematics rating:	Start Class	Mid Priority	Field: Algebra
Please update this rating as the article progresses, or if the rating is inaccurate. Click to show/hide comments. Please add to or update the comments to suggest improvements to the article. --Cronholm144 03:30, 16 June 2007 (UTC)

I changed this from a redirect to Lattice (order) to an article. This does induce some material reduplication; but in general, in these articles a binary operation is distinguished from a set with this binary operation. For consistency; in order to be able to include join in the category of binary operations; and since joins are found not only in lattices but also in semilattices, I thought it better to include a brief stand-alone article.

I did the same for Meet (mathematics). The two articles are ridicuously similar; and I think it is high time to describe the basic duality of the two lattice operations more explicitly. JoergenB 20:03, 21 September 2006 (UTC)

[edit] Should the name be changed?

Considering the join concept in Relational algebra, perhaps it is somewhat pretentious to retain the title Join (mathematics) for this article? JoergenB 20:19, 21 September 2006 (UTC)

[edit] Ick, not cut and paste!

You should not do that -- sooner or later someone will change one article without changing the other (or, even worse, make non-dual changes to both articles). Also, you haven't been particularly explicit about their duality on the actual pages.

P.S. Maybe semilattice is a better place to talk about meet and join, hmm? User:SamB 13 November 2006

[edit] Join & Meet examples

The meet and join pages would both be much clearer with some examples! Harry Metcalfe 13:09, 19 January 2007 (UTC)