Copyright © 2004, 2007, 2008, 2010, 2011, and on, Leon van Dommelen. You are allowed to copy and/or print out this work for your personal use. However, do not distribute any parts of this work to others or post it publicly without written permission of the author. Instead please link to this work. I want to be able to correct errors and improve explanations and actually have them corrected and improved. Every attempt is made to make links as permanent as possible.
As far as search engines are concerned, conversions to html of the pdf version of this document are stupid, since there is a much better native html version already available. So try not to do it.
Readers are advised that text, figures, and data may be inadvertently
inaccurate. All responsibility for the use of any of the material in
this book rests with the reader. (I took these sentences straight out
of a printed commercial book. However, in this web book, I do try to
inaccuracies, OK, blunders, pretty quickly if
pointed out to me by helpful readers, or if I happen to think twice.)