This book will be expanded/updated frequently and unpredictably. The directory has a pdf version, the bib file, the complete Rmd file with the code chunks, the R and C source code, and whatever else is needed for perfect reproducibility. Suggestions for improvement of text and code are welcome. All text and code are in the public domain and can be copied and used by anybody in any way they like. Attribution will be appreciated, but is not required.

Just as an aside: “above” in the text refers to anything that comes earlier in the book and “below” refers to anything that comes later. This always confuses me, so I had to write it down. I also number all displayed equations. Equations are displayed if and only if they are important, are referred to in the text, or mess up the line spacing.