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From: "F. Russell" <fr@random.info>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: Circle and Eclipses
Date: 24 Oct 2017 23:46:30 GMT
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On Mon, 23 Oct 2017 23:34:30 +0000, Popping mad wrote:

> 
> x**2 - y**2 = 2 in gnuplot?
>

I'll give you only a hint because it will serve you a lot better
in the long run.

Do a search for "implicit function."

Here are just two of the many results:

https://en.wikipedia.org/wiki/Implicit_function

https://en.wikipedia.org/wiki/Implicit_curve

Happy learning!