Thanks! In fact, I originally wanted to write a classic paper, but I realized that ... * The subject isn't complex enough to really fill a paper. * Whenever I

Thanks! In fact, I originally wanted to write a classic paper, but I realized that ... * The subject isn't complex enough to really fill a paper. * Whenever I want to talk to someone about this, presentation slides are very handy in contrast to continuous text. * The audience are people in the web, who look at it on screen and won't print it. In addition, I was inspired by other mathematical slides such as http://www.tu-harburg.de/~matjz/work/lectures/ZAemB.pdf http://www.tu-harburg.de/~matjz/work/lectures/ZAemB.pdf