From: ptkwt@...1.aracnet.com (Phil Tomson)
Date: 2003-06-07T14:29:57+09:00
Subject: Re: Relation class

In article <a6e48b6b.0306062001.42039e1a@posting.google.com>,
you CAN teach an old dog ... <itsme213@hotmail.com> wrote:
>Does anyone know of a Relation class with methods such as
>  domain
>  range
>  add
>  remove
>  image
>  inverse_image
>  compose
>  inverse_compose
>  inverse
>  override
> 

I don't know of one, but it would be nice to have one... 

Phil