Bifolium
A Folium with 
. The bifolium is the Pedal Curve of the Deltoid, where the Pedal Point is theMidpoint of one of the three curved sides. The Cartesian equation is
and the Polar equation is
See also Folium, Quadrifolium, Trifolium
References
Lawrence, J. D. A Catalog of Special Plane Curves. New York: Dover, pp. 152-153, 1972. MacTutor History of Mathematics Archive. ``Double Folium.''http://www-groups.dcs.st-and.ac.uk/~history/Curves/Double.html.
- Lagrange's Four-Square Theorem
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- Lagrange's Identity
- Lagrange's Interpolating Fundamental Polynomial
- Lagrange's Lemma
- Lagrange Spectrum
- Lagrangian Coefficient
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- Laguerre Differential Equation
- Laguerre-Gauss Quadrature
- Laguerre Polynomial
- Laguerre Quadrature
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- Lambda Calculus
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- Lambert Azimuthal Equal-Area Projection
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- Lambert Series