Twist maps are maps on the 2-dimensional torus of the form
Download the free software
chirikov.tgz as a 86 K
gziped tar ball. chirikov
is a simple program to explore the phase space or compute the
entropy of such maps.
Check out the
chirikov was used to produce pictures and animations in the
If f(x)=g sin(x), the map is called the Chirikov Standard map.
All measurements indicate that the entropy of this map
is bounded below by log(g/2).
Make your own experiment in the
You can also explore the phase space with a
Java applet .
The animated torus creature below is
Some more information can be found on the