Cartesian equation:
yn = k(a - x)pxm
The name Pearls of Sluze was given to these curves by Blaise Pascal.
The particular curves drawn above have
n = 4, k = 2, a = 4, p = 3, m = 2.
The URL of this page is:
http://www-history.mcs.st-andrews.ac.uk/history/Curves/Pearls.html