Spiric section
QUARTIC PLANE CURVE; BICIRCULAR QUARTIC CURVES THAT ARE SYMMETRIC WITH RESPECT TO THE X AND Y-AXES. SPIRIC SECTIONS ARE INCLUDED IN THE FAMILY OF TORIC SECTIONS AND INCLUDE THE FAMILY OF HIPPOPEDES AND THE FAMILY OF CASSINI OVALS
Spiric curve; Persian curve; Spiric sections; Spiric Sections
In geometry, a spiric section, sometimes called a spiric of Perseus, is a quartic plane curve defined by equations of the form