Seltsame Attraktoren

Continuous-time flows dx/dt = f(x): integrate with RK4 and watch sensitive dependence on initial conditions.

Presets & ideas

• Lorenz — classic 1963 model of convection rolls; the “butterfly” strange attractor underlies popular chaos–weather metaphors (not a forecast model).
• van der Pol — 2D limit cycle for small μ; Poincaré–Bendixson rules out chaos in the plane, but a forced 3D extension can be chaotic.
• Duffing — here as a driven ODE; a related quadratic map also shows period doubling (compare Iterated maps).
• Mackey–Glass — delay feedback; needs history buffers in RK4.
• Hénon–Heiles — 4D Hamiltonian; energy view plots the conserved Hamiltonian.

Poincaré sections slice a 3D orbit when a coordinate crosses a plane; time series and energy strips scroll as the simulation runs.