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Re: Thinking about MINUS

From: Marshall <marshall.spight_at_gmail.com>
Date: 7 Jan 2007 11:46:32 -0800
Message-ID: <1168199192.024527.223910@i15g2000cwa.googlegroups.com> 





On Jan 7, 7:36 am, J M Davitt <jdav..._at_aeneas.net> wrote:


> All this "boolean operations on sets" has me scratching my head.  There

> is, underneath it all, the presumption that one really means "is an

> element of," right?




If we're talking about plain sets, then yes. If we're talking about
relations, it gets more interesting.




Marshall
Received on Sun Jan 07 2007 - 13:46:32 CST












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