==Special cases== When d>0 the curve has an oval form and is often known as an oval of Booth, and when d<0 the curve resembles a sideways figure eight, or lemniscate, and is often known as a lemniscate of Booth, after James Booth (1810–1878) who studied them. Hippopedes were also investigated by Proclus (for whom they are sometimes called Hippop...
Found on
http://en.wikipedia.org/wiki/Hippopede
A quartic curve described by the equation (x
2 + y
2)
2 + 4b(b - a)(x
2 + y
2) - 4b
2x
2 = 0 where a and b are positive constants. Hippopede ...
Found on
http://www.daviddarling.info/encyclopedia/H/hippopede.html
No exact match found.
