I am implemented a small program for visualization implicit curves and surfaces. But I can not find enough examples for testing.
Can you advice a site who contains a large number of various and interesting of implicit function?
This site must be display equations in list format with plot images. Similar question
Try these surface galleries; there are many others around:
http://surf.sourceforge.net/gallery.shtml
https://homepage.univie.ac.at/herwig.hauser/bildergalerie/gallery.html
https://homepage.univie.ac.at/herwig.hauser/gallery.html
https://danielleamethyst.org/gallery/hauser/
https://imaginary.org/gallery/algebraic-surfaces
https://imaginary.org/program/surfer