Suppose that a reader, perhaps intrigued by the title, wanted to see immediately if the book was really
and consequently arrived here without having read neither the Forward nor the Introduction. I believe that such a reader would have made an error and missed an essential aspect of the spirit of the book. I would strongly advise such a reader to return and read those parts of the book. However, since the reader is at liberty to do as he or she chooses, and since I personally know many readers who have the habit (may I say the
?) of not reading introductions, I have decided not to mislead even those readers and so I will begin with this very short chapter, a typical Chapter 0, in which one does some simple computations and then discusses the results obtained by those computations.