Gary, I browsed through some of Siegel's writings and listened to one of his YouTube talks. They reminded me of the PBS program about Bach, which I mentioned in a note on Friday. J. S. Bach is an excellent example of a man with a brilliant mind that was integrated with every aspect of the body, action, music, dancing, emotion, family, friends, and life -- he also managed to have 20 children. I mentioned Bach's music, which is as precise as anything in mathematics, but it is also integrated with emotion. It shows how diagrammatic reasoning can encompass both, > I've no way of knowing how Siegel actually uses mathematics in his theory. Still it does seem clear enough that such ideas as self-organization and emergence. I don't know Siegel's work well enough to say anything. But that PBS program does a good job of covering the many sides of Bach's life and work: https://www.thirteen.org/programs/great-performances/now-hear-this-the-riddle-of-bach-0gvsgj/ John
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