The curves with integral 
, 
, and 
 were studied by de Sluze between 1657 and 1698. The name ``Pearls of Sluze''
was given to these curves by Blaise Pascal 
 (MacTutor Archive).
References
MacTutor History of Mathematics Archive.  ``Pearls of Sluze.''
http://www-groups.dcs.st-and.ac.uk/~history/Curves/Pearls.html.
 
© 1996-9 Eric W. Weisstein 
1999-05-26