Re: circular relationships ok?
From: Jan Hidders <jan.hidders_at_REMOVETHIS.pandora.be>
Date: Sat, 04 Mar 2006 09:58:32 GMT
Message-ID: <cxdOf.293694$Hj5.9315432_at_phobos.telenet-ops.be>
>
>
> That does not make any obvious sense. What do you mean by '[value] a
> implies [value] b' ? Are you considering only the Boolean domain ?
Date: Sat, 04 Mar 2006 09:58:32 GMT
Message-ID: <cxdOf.293694$Hj5.9315432_at_phobos.telenet-ops.be>
vc wrote:
> Brian Selzer wrote:
>
>>[...] >>if a and b are values >>for A and B respectively in a tuple of R, a implies b and b implies a, >>therefore, a iff b.
>
>
> That does not make any obvious sense. What do you mean by '[value] a
> implies [value] b' ? Are you considering only the Boolean domain ?
I think he means with "implies" something like "functionally determines", and with "iff" something like "has a one-to-one relationship with".
- Jan Hidders