Trifolium
Lawrence (1972) defines a trifolium as a Folium with 
. However, the term ``the'' trifolium issometimes applied to the Folium with 
, which is then the 3-petalled Rose with Cartesian equation
and polar equation
The trifolium with
is the Radial Curve of the Deltoid.See also Bifolium, Folium, Quadrifolium
References
Lawrence, J. D. A Catalog of Special Plane Curves. New York: Dover, pp. 152-153, 1972. MacTutor History of Mathematics Archive. ``Trifolium.''http://www-groups.dcs.st-and.ac.uk/~history/Curves/Trifolium.html.
- Jacobi's Theorem
- Jacobi Symbol
- Jacobi Tensor
- Jacobi Theta Function
- Jacobi Transformation
- Jacobi Triple Product
- Jacobi Zeta Function
- Jacobsthal-Lucas Number
- Jacobsthal-Lucas Polynomial
- Jacobsthal Number
- Jacobsthal Polynomial
- Jaco-Shalen-Johannson Torus Decomposition
- Janko Groups
- Japanese Triangulation Theorem
- Jarnick's Inequality
- j-Conductor
- Jeep Problem
- Jenkins-Traub Method
- Jensen Polynomial
- Jensen's Formula
- Jensen's Inequality
- Jerabek's Hyperbola
- Jerk
- j-Function
- Jinc Function