Re: more on delete from join

From: Tegiri Nenashi <tegirinenashi_at_gmail.com>
Date: Tue, 1 Sep 2009 12:16:33 -0700 (PDT)
Message-ID: <10877386-b023-4028-b815-8bbd8dec8c85_at_y4g2000prf.googlegroups.com>



On Sep 1, 11:15 am, Vadim Tropashko <vadim..._at_gmail.com> wrote:
> OK, here is a simpler question: is the system
>
> x v y = u
> x ^ y = w
>
> underconstrained, or it could be solved in terms of x and y
>
> x = f(u,w)
> y = g(u,w)
>
> ? One of the basic RL results is that it is undeconstrained!

It is under constrained even in Boolean Algebra:

v:
011
100

---
111

^:
011
100
---
000

versus:

v:
001
110
---
111

^:
001
110
---
000
Received on Tue Sep 01 2009 - 14:16:33 CDT

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