I put together a cheat sheet a while ago: http://www.flickr.com/photos/spullara/2629936/ http://www.flickr.com/photos/spullara/2629936/ Not as entertaining bu

I put together a cheat sheet a while ago: http://www.flickr.com/photos/spullara/2629936/ http://www.flickr.com/photos/spullara/2629936/ Not as entertaining but tries to show you how the various parts are derived from one another. Interesting that n is half of m.