Digital library of implicit curves and surfaces 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
