On Sun, Apr 08, 2007 at 10:18:10AM +0200, Chrilly wrote:
Paper 1 in the list below states:
Numbers were originally implemented in Lisp I as a list of atoms.
and the Lisp 1.5 manual states: Arithmetic in Lisp 1.5 is new
Could you give an example how the number 3 was implemented in Lisp-1
Subject: Re: [computer-go] LISP question (littlle bit off topic)
Crilly,
I used to program in LISP and had never heard of this, so I did some
checking. I think this is a misconception from the fact that numbers were
considered atoms and hence stored on the list of atoms. Instead of just
being
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
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
On Sat, 2007-04-07 at 21:54 +0200, 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
You are looking for a formalization of natural numbers.
The one you describe is probably a mangled description of the
construction from set theory.
AFAIK The natural Lisp construction is from the Peano axioms.
A shallow discourse:
