- Harmonic oscillator (+ damped oscillator, forced oscillator) Note: It's linear !
- Duffing oscillator 1 / Duffing oscillator 2 (with two initial conditions which are slightly different from each other)
- Duffing oscillator 3 / Duffing oscillator 4 (with two initial conditions which are slightly different from each other)
- Coupled Oscillator Systems (Case of the Millennium Bridge)
- ref : S. H. Strogatz, "Crowd synchrony on the Millennium Bridge", Nature vol.438 p. 43
- KdV equation
- Kuramoto-Shivashinsky equation