Logistic Map Bifurcation & Feigenbaum Constant

xn+1 = r·xn(1−xn). Period-doubling route to chaos. Feigenbaum δ ≈ 4.6692: ratio of successive bifurcation intervals is universal. Click to zoom.
Iterations: 300
Skip: 200
r range: [2.5, 4.0]
r₁=3.000 (period-2)
r₂=3.449 (period-4)
r₃=3.544 (period-8)
δ = 4.6692...