A. Addenda

This appendix describes a number of additional topics. They did not seem important enough to warrant including them in the main text. An addition is always a distraction; at the minimum you have to worry about whether you need to worry about it. However, many of the topics below are covered in well-known other texts. Obviously many other authors disagree about their importance. If they turn out to be right, you can find it here.



Subsections