Re: Columns without names

From: vc <boston103_at_hotmail.com>
Date: 19 Sep 2006 10:47:56 -0700
Message-ID: <1158688076.706296.235010@k70g2000cwa.googlegroups.com>

Jan Hidders wrote:
> JOG wrote:
> >
> > Imagine, f'rinstance, I have a data collection in which I have
> > propositions of dogs' names & ages and owners' names & ages. Both sets
> > of propositions would traditionally be represented as (name:x, age:y),
> > but yet are housed in separate relations to form my manipulable
> > datatbase. How exactly has this been determined by the set intension?
>
> Perhaps I misunderstand your question becuase the answer is trivial:
> they are modelled as the same relation if and only if the set intension
> is the same.

What's a "set intension" ?

> Of course, formally defining when two set intensions are
> the same is hard or even impossible.

Assuming we know what a "set intension" is, how do we derive it from a set ?

>
> -- Jan Hidders
Received on Tue Sep 19 2006 - 12:47:56 CDT