Date: Wed, 16 Oct 2002 19:06:29 -0400 (Eastern Daylight Time)
On Wed, 16 Oct 2002 17:26:54 -0500 Luis A Escobar <firstname.lastname@example.org> wrote:
> I meant pictures to teach the concepts of union, intercepts, etc to
> illustrate those operations. I saw the case you document and that
> is exactly what i was looking for.
Fwiw, these are simple to produce in PostScript.
If you find a way to do it in Dia, please post
a brief description.