# Talk:Symmetric difference

WikiProject Mathematics (Rated Start-class, Mid-priority)
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:
 Start Class
 Mid Priority
Field: Basics

• JA: Not that big of a deal, but it can be very useful to the reader, both on first and subsequent readings of an article, to have a syllabus of related topics collected in one place. For instance, I think of the times I myself spend looking for a topic I know I saw in some topical connection but can't rememeber where and it's too much of a hassle searching through multiple texts. No trees were harmed in the making of these compendia. Jon Awbrey 04:15, 12 March 2006 (UTC)
[1] I don't feel strongly about it, you may put some back if you wish. :) Oleg Alexandrov (talk) 04:45, 12 March 2006 (UTC)

## Balking at "equivalence" with XOR

I've just changed the first paragraph, which did call symmetric difference the "set-theoretic equivalent" of exclusive disjunction. For me, that's too much abuse of terminology (viz. equivalent), especially in an article on a mathematical topic. So I've merely replaced equivalent with kin. My replacement is no less vague, but at least its imprecision is more above board.—PaulTanenbaum (talk) 13:03, 28 January 2008 (UTC)

## References?

Does anyone have references to where to find this in the (printed) literature ? Who first introduced the symmetric difference (pseudo)metric? —Preceding unsigned comment added by 193.190.253.149 (talk) 12:08, 21 May 2008 (UTC)

## Symmetric difference symbol, ${\displaystyle A\,\Delta \,B}$ or ${\displaystyle A\ominus B}$?

Does anyone know which of the two symbols is more commonly used? – Fuzzy – 13:09, 17 August 2011 (UTC)

## relation to multisets

Can someone source and make more precise the statements in relation to multisets. They were state with "is" which was obviously an abuse of language, so I've changed it to "equivalent". But in what precise (say categorical) sense are these equivalent? 86.127.138.67 (talk) 16:56, 9 April 2015 (UTC)