----- Original Message ----- 
From: Mathieu Bouchard <matju / cam.org>
To: ruby-talk ML <ruby-talk / netlab.co.jp>
Sent: Wednesday, October 25, 2000 9:08 PM
Subject: [ruby-talk:5859] Re: Symbolic evaluation without quoting trick.


> > # > I thought some people here might find the following trick useful,
> > # > possibly for other sorts of applications.
> > # >   Re: ANNOUNCE: PySymbolic - Doing Symbolics in Python
> > # I think there was a 10-line Perl example for that. Maybe in Conway's 
> > book.
> > Found it.
> > It's actually an interesting 1+ page long example of a Roman numerals
> > class (in chapter 10 on operator overloading). 
> 
> I'm not talking about roman numerals nor klingon mathematics. I'm talking
> about building s-exps (in the shape of arrays) using perl expressions and
> operator overloading. I thought it was in book. (I also thought it was
> in "perldoc overload" but it wasn't.)
> 
> matju
> 

What are s-expressions? Is this symbolic math, as in symbolic
differentiation and so on?

Hal