I don't have a reference, but it's probably a variant of Church
Numerals:
http://en.wikipedia.org/wiki/Church_numeral
On Apr 7, 2007, at 12:54 PM, Chrilly wrote:
Up to my knowledge the first Lisp Versions had no number system.
The number n was represented as the list of numbers from 1 to n
(which is also the mathematical/axiomatic definition of the natural
numbers).
But its not very practical. Can anyone provide me with a link how
this was done. I am speaking some computer languages, but Lisp is
not among them.
I want to present the code in an article for the Austrian AI-
Journal (as an example that mathematical elegance and practically
usefull are 2 different things).
Chrilly
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