Re: Objects and Relations
From: Marshall <marshall.spight_at_gmail.com>
Date: 30 Jan 2007 13:41:56 -0800
Message-ID: <1170193316.911575.181140_at_v45g2000cwv.googlegroups.com>
Date: 30 Jan 2007 13:41:56 -0800
Message-ID: <1170193316.911575.181140_at_v45g2000cwv.googlegroups.com>
On Jan 30, 11:43 am, "Neo" <neo55..._at_hotmail.com> wrote:
> > > what is a relational expression for the string bob?
>
> > { (0, 'b'), (1, 'o'), (2, 'b') }
>
> Is the following relationally equivalent?
>
> { (2, 'b'), ('b', 0'), ('o', 1) }
> According to set theory, is the ordering of a set's elements relevant,
> required or allowed?
Elements of a set have no order. If a syntactic form of a set has order (which it will, because syntax has implicit order) then that order has no meaning.
Marshall Received on Tue Jan 30 2007 - 22:41:56 CET