derivations - book: Derivations of Applied Mathematics

       The book and this manpage are written by Thaddeus  H.  Black,  who  also  maintains  the  Debian  package
       derivations in which Debian distributes them.  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>.

       The book remains a work in progress.

       Copyright (C) 1983-2021 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.

Thaddeus H. Black                                7 January 2021                                   DERIVATIONS(7)

       For  various valid reasons, open-source program sources rarely derive the mathematical formulas they use.
       A user, nevertheless -- not wishing to take such formulas on faith -- might wish  to  see  such  formulas
       somewhere derived.

       DerivationsofAppliedMathematics  is  a  book  that derives, and documents, many of the mathematical
       formulas and methods open-source programs use, and indeed many  of  the  formulas  and  methods  used  in
       science  and  engineering  generally.   For  example, it derives and documents 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.

/usr/share/doc/derivations/derivations.pdf
              the book in PDF

       derivations - book: Derivations of Applied Mathematics

       Among   other   ways,   you   can   read   the   book  on  your  computer  screen  by  opening  the  file
       /usr/share/doc/derivations/derivations.pdf with a PDF reader like (for example) evince(1).