Wolfram Research supplies a free plug-in for viewing and interacting with online documents saved from

*Mathematica*in Computable Document Format (CDF) - the plug-in can be downloaded from here. I thought that I would try it out on a few of my interactive*Mathematica*demonstrations, and here are the (draft) results for you to enjoy:- Topographic String: This grows a 1-dimensional self-organising map, starting from 3 nodes and progressively inserting additional nodes. It is an implementation of the SOM training method that I published in 1988: "Self-organising multilayer topographic mappings",
*Proceedings of 2nd International Conference on Neural Networks*(San Diego, USA), pp. I/93-I/100 - an online version is available here. - Ising Model: This simulates a 2-dimensional Ising model, and it allows you to dynamically vary the clique factors for the 4 distinct types of 2-clique (i.e. N/S, E/W, NE/SW, SE/NW) to see how the Ising model behaves. It is an implementation of the Ising model simulations described in a report that I wrote in 1985: "The implications of Boltzmann-type machines for SAR data processing: a preliminary survey",
*RSRE technical report*, 3815 - an online version is available here. - BZ Reaction: This simulates the Belousov–Zhabotinsky reaction-diffusion system - it's very pretty.
- Current Algebra: This interactively computes commutators of products of current operators - it's a bit inflexible, but it shows some interesting
*Mathematica*techniques in action. - IMO 2011: This is hot off the press in response to Terence Tao's Minipolymath3 project: 2011 IMO, which plans to work on Q6 of the 2011 International Mathematics Olympiad. I have implemented an interactive version of Q6, so you can get an intuitive feel for the geometry involved.
**Update:**I see that TT eventually decided to go with Q2 rather than Q6. Oh well, my interactive Q6 is fun to play with anyway.

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