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Re: [ontolog-forum] Time representation

To: "[ontolog-forum] " <ontolog-forum@xxxxxxxxxxxxxxxx>
From: Randall R Schulz <rschulz@xxxxxxxxx>
Date: Tue, 22 Jan 2008 17:58:32 -0800
Message-id: <200801221758.32963.rschulz@xxxxxxxxx>
On Tuesday 22 January 2008 15:29, Pat Hayes wrote:
> ...
> FWIW, there has been some interesting work on interval algebras for
> circular time. Turns out that there are 16 (rather than 13) possible
> interval relations on a circle, and they have a very elegant group
> structure. Moreover, the standard 'time line' is simply the circle
> with one point missing (the point at infinity), which rules out 4 of
> the relations and splits one of the remaining 12 into two cases:
> hence the peculiar number (13) of interval relations on a line. It
> also of course ruins the lovely symmetry of the circle.    (01)

I'm sure Einstein would appreciate the beauty of it all. (While cursing 
his computer...)    (02)

> Pat    (03)

RRS    (04)

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