Re: Thinking about MINUS
From: DBMS_Plumber <paul_geoffrey_brown_at_yahoo.com>
Date: 8 Jan 2007 09:49:13 -0800
Message-ID: <1168278552.531567.114870_at_11g2000cwr.googlegroups.com>
Date: 8 Jan 2007 09:49:13 -0800
Message-ID: <1168278552.531567.114870_at_11g2000cwr.googlegroups.com>
Marshall wrote:
> Even if we consider a system consisting only of the natural numbers,
> zero, successor and predecessor, we have to wrestle with the question
> of what the predecessor of zero is.
Zero is not an element of the domain of natural numbers. Received on Mon Jan 08 2007 - 18:49:13 CET