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Re: Lambda calculus and it relation to LISP
From: |
William Elliot |
Subject: |
Re: Lambda calculus and it relation to LISP |
Date: |
Fri, 11 Oct 2002 21:02:39 -0700 |
On 11 Oct 2002, Alfred Einstead wrote:
> William Elliot <mars@xx.com> wrote:
> > > ((lambda (x) x x) (lambda (x) x x))
> > (Lx.xx)(Lx.xxx)
>
> That one, however, DOES has a normal form: the
> rational infinite expression
> DT -> ((((...)T)T)T)T
> where
> D = lambda x. xx
> T = lambda x. xxx
>
> In GNUese, this is the rational infinite lambda
> expression Z, where Z is the GNUbreviation of ZT.
>
dd -> dd -> dd -> dd -> dd -> ...
dt -> ttt -> tttt -> ttttt -> ...
Neither reduces to stable form without further reductions to be made.
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