Mandelbrot Set Hidden Inside Newton's Method

Newton iteration on p(z) = (z+1)(z−1)(z−λ) reveals Mandelbrot structure in λ-parameter space. Click left canvas to inspect dynamical basins.

λ-Parameter Space (click to pick λ)
Computing…
Dynamical Plane (Newton Basins)

Current λ

Re(λ):
Im(λ):
Seed z₀ = λ/3:
Re(z₀):
Im(z₀):

Basin Colors
Root r₁ = +1
Root r₂ = −1
Root r₃ = λ
λ-space: 2-cycle / no conv.
Key formula:
p(z) = (z+1)(z−1)(z−λ)
Newton step:
z → z − p(z)/p′(z)

Mandelbrot boundary:
|c| ≈ 1/4 (main cardioid)

Centroid λ/3 lies at
the Mandelbrot boundary
when λ traces the
cardioid of the M-set.