home *** CD-ROM | disk | FTP | other *** search
- # GEISEL.ODE
- # T. Geisel, Phys Rev Lett 59, 2503 (1988). A diffusive chaotic system.
- # An exquisite example!!
- # Plot x vs. y and keep continuing the solution with F7.
- # A particle moves in a 2D periodic potential.
- # Author claims spectrum is 1/f.
-
- $m 5
- $n 500
- $t 200
-
- # Particle position is (x,y)
- x = 0
- y = 0
- vx = 1
- vy = 0.5
- x' = vx
- y' = vy
- vx' = (1.5+0.5*cos(y))*sin(x)
- vy' = (1.5+0.5*cos(x))*sin(y)