Re: Proposal: 6NF
From: Marshall <marshall.spight_at_gmail.com>
Date: 19 Oct 2006 15:42:29 -0700
Message-ID: <1161297749.148249.152100_at_i42g2000cwa.googlegroups.com>
Date: 19 Oct 2006 15:42:29 -0700
Message-ID: <1161297749.148249.152100_at_i42g2000cwa.googlegroups.com>
On Oct 19, 10:42 am, "vc" <boston..._at_hotmail.com> wrote:
>
> Any math binary operation should map pairs of values from some set to a
> value in the same set (SxS -> S), that's the essential property of the
> math structures known from one's school years, such as the natural
> numbers, the set of ntegers, the set of rationals, the set of reals,
> the complex numbers, etc,
Wouldn't this then say that it was impossible to subtract two natural numbers? Or are you saying subtraction of natural numbers is not a "math binary operation?"
Marshall Received on Fri Oct 20 2006 - 00:42:29 CEST