PLANE CURVES A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site rose curve The quadrifolium: a special case of the rose curve A curve that has the shape of a flower with petals. It was named rhodonea ("rose") by the Italian mathematician Guido Grandi in the 1720s. It is given by the polar equation r = a sin(nθ). If n is odd the rose has n petals, if n is even the rose has 2n petals, and if n = 2 the rose becomes the quadrifolium. If n is an irrational number, then there are an infinite number of petals. Related category    • PLANE CURVES Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP