The Guess who entity posted thusly:

On Mon, 20 Feb 2006 12:50:59 -0600, Oleg Lego
wrote:

That was my plan... I only need a few templates to form a framework to
be filled. I was going to use the "hanging chain catenary" for it, but
this will be easier.

They are different. You can still as easily plot the catenary though
if that's what you want. Nobody will notice the difference [or be too
interested.] You'll need the parabola if you need a focal point.

Interesting. I was told that a catenary was a parabola. Of course it
was a web page somewhere that told me this, and we all know how
absolutely accurate web pages are. I will need a focal point, so
thanks for the info.