This page contains an interactive applet, which will only be run if your browser supports the Java programming language. The applet is about 11 K, so it will take some time to load.
The applet below displays a small spin network, and computes the amplitudes it assigns to geometries with a range of curvatures. You can choose different network topologies from the menu at the top of the applet, or click anywhere else to see a new network with the same topology but a different set of spins labelling the edges. More details