derivations - book: Derivations of Applied Mathematics

Understandably, program sources rarely derive the mathematical formulas they
use. Not wishing to take the formulas on faith, a user might nevertheless
reasonably wish to see such formulas somewhere derived.

*Derivations of Applied Mathematics* is a book which documents and derives
many of the mathematical formulas and methods implemented in free software or
used in science and engineering generally. It documents and derives the Taylor
series (used to calculate trigonometrics), the Newton-Raphson method (used to
calculate square roots), the Pythagorean theorem (used to calculate distances)
and many others.

Among other ways, you can read the book on your computer screen by opening the
file

*/usr/share/doc/derivations/derivations.ps.gz* with the

**gv**(1)
program under

**X**(7). To print the book on a standard postscript printer,
just

**zcat**(1) then

**lpr**(1) the same file.

*/usr/share/doc/derivations/derivations.ps.gz*
- the book in postscript format

*/usr/share/doc/derivations/derivations.pdf.gz*
- the book in PDF

The book is a work in progress.

The book and this manpage are written by Thaddeus H. Black, who also maintains
the Debian package

*derivations* in which they are distributed. Users who
need to contact the author in his role as Debian package maintainer can reach
him at <thb@debian.org>. However, most e-mail will naturally be about
the book itself: this should be sent to <thb@derivations.org>.

Copyright (C) 1983-2010 Thaddeus H. Black.

The book, this manpage and the entire

*derivations* distribution are free
software. You can redistribute them and/or modify them under the terms of the
GNU General Public License, version 2.

**gv**(1) [

*gv*],

**zcat**(1) [

*gzip*],

**psselect**(1)
[

*psutils*],

**lpr**(1) [

*lpr*],

**octave**(1)
[

*octave*]