‘-3RSSSS - (L-S)RSS + RS - π(R) = 0 where π(R) = 4-3 P/ AQR = -(2-3/A)dhui/DR’, better known as
the ponytail equation, is a mathematical equation that models the swelling of a ponytail as the hair interacts with atmospheric forces. It’s also the title of a choreographed dance by Adrienne Truscott, which was second in the lineup performed by the Barnard/Columbia Dance Troupe at New York Live Arts.