Sylvester’s amphigenous surface Gallery Sylvester’s amphigenous surface Sylvester’s amphigenous surface In the 19th century Sylvester described a surface for studying the number of real roots of a polynomial. Henrici later constructed a model of this. This is a modern version. Oliver Labs2017-03-27T09:54:29+02:00all, discriminant surfaces, nonic surface (degree nine), strong and flexible| Read More