Re: RM and definition of relations/tuples
From: Jonathan Leffler <jleffler_at_earthlink.net>
Date: Sat, 26 Nov 2005 06:13:34 GMT
Message-ID: <i2Thf.932$YT3.850_at_newsread3.news.pas.earthlink.net>
>>The first definition is closer to the "mathematical" relation where a
>>tuple is an *ordered* sequence. [...]
Date: Sat, 26 Nov 2005 06:13:34 GMT
Message-ID: <i2Thf.932$YT3.850_at_newsread3.news.pas.earthlink.net>
x wrote:
> "vc" <boston103_at_hotmail.com> wrote:
>>The first definition is closer to the "mathematical" relation where a
>>tuple is an *ordered* sequence. [...]
>
> Is this set *ordered* ?
> {1,2,3,4,5,6}
Not if it is a set; its members are merely listed in order.
-- Jonathan Leffler #include <disclaimer.h> Email: jleffler_at_earthlink.net, jleffler_at_us.ibm.com Guardian of DBD::Informix v2005.02 -- http://dbi.perl.org/Received on Sat Nov 26 2005 - 07:13:34 CET