Re: Is {{}} a valid construct?
From: Neo <neo55592_at_hotmail.com>
Date: 2 Feb 2007 21:54:47 -0800
Message-ID: <1170482087.383175.269290_at_k78g2000cwa.googlegroups.com>
Date: 2 Feb 2007 21:54:47 -0800
Message-ID: <1170482087.383175.269290_at_k78g2000cwa.googlegroups.com>
> {} would be the nullary relation called DUM
> having cardinality and degree zero
> {{}} would be the nullary relation called DEE
> having cardinality one and degree zero
> DEE and DUM are the relational analogs of true and false.
According to my understanding, it seems {} and {{}} are invalid constructs. How can I empirically verify they are valid? I can't see how nothing means something. Received on Sat Feb 03 2007 - 06:54:47 CET