Cycles of the logistic map
  The onset and bifurcation points of the $n$-cycles of a polynomial map are located through a characteristic equation connecting cyclic polynomials formed by periodic orbit points. The minimal polynomials of the critical parameters of the logistic, H\'enon, and cubic maps are obtained for $n$ up to 13, 9, and 8, respectively. 
Cheng Zhang
physics.comp-ph math.DS