Double Pendulum & Lyapunov Chaos

Two pendulums start nearly identical — watch exponential divergence

Initial δθ (separation) 0.001 rad
Gravity g = 9.8
L₁ length 90px
Speed x2
Lyapunov exponent λ > 0 means chaos — nearby trajectories diverge exponentially. The separation Δ(t) ≈ δ·e^(λt).