[Openmcl-devel] inverse function

Nicolas Neuss neuss at math.uni-karlsruhe.de
Sat Feb 13 13:33:53 UTC 2010


Taoufik Dachraoui <taoufik at mazeboard.com> writes:

> Dear,
>
> Does someone know if there is any work done to generate an inverse of
> any given lisp function (if possible).
>
> Example:
>
>> (defun f (x)  (+ x 1))
>> (f 2)
> 3
>> (funcall (inverse #'f) 3)
> 2
>> (funcall (inverse #'f) (f 5))
> 5
>
> This example is very simple and serves only to describe my needs; I
> would like to use the inverse function for complex lisp defined
> functions.
>
> Thank you for your help
>
> Taoufik

BTW, since this question is not implementation-specific, it would fit
perfectly in the comp.lang.lisp newsgroup:-)

Nicolas



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