Bicorn
The bicorn is the name of a collection of Sylvester 
in 1864 and Cayley in 1867 (MacTutor Archive). The bicorn is given by the parametric equations
 |  |  | |
 | |  |
The graph is similar to that of the Cocked Hat Curve.
References
Lawrence, J. D. A Catalog of Special Plane Curves. New York: Dover, pp. 147-149, 1972. MacTutor History of Mathematics Archive. ``Bicorn.''http://www-groups.dcs.st-and.ac.uk/~history/Curves/Bicorn.html.
- Slothouber-Graatsma Puzzle
- Slutzky-Yule Effect
- Sluze Pearls
- Smale-Hirsch Theorem
- Smale Horseshoe Map
- Small Cubicuboctahedron
- Small Ditrigonal Dodecacronic Hexecontahedron
- Small Ditrigonal Dodecicosidodecahedron
- Small Ditrigonal Icosidodecahedron
- Small Dodecacronic Hexecontahedron
- Small Dodecahemicosacron
- Small Dodecahemicosahedron
- Small Dodecahemidodecacron
- Small Dodecahemidodecahedron
- Small Dodecicosacron
- Small Dodecicosahedron
- Small Dodecicosidodecahedron
- Small Hexacronic Icositetrahedron
- Small Hexagonal Hexecontahedron
- Small Hexagrammic Hexecontahedron
- Small Icosacronic Hexecontahedron
- Small Icosicosidodecahedron
- Small Icosihemidodecacron
- Small Icosihemidodecahedron
- Small Inverted Retrosnub Icosicosidodecahedron