\section*{Preface}
This book evolved from lecture notes developed over several years
of teaching numerical methods at the University of Aarhus.  The book
contains short descriptions of some of the most common numerical methods
together with illustrational implementations of the discussed algorithms
mostly in the C programming language.  The implementations are solely for
educational purposes, they are not thoroughly tested and are not tuned
in any way other than to fit nicely on a single page of the book; some
simple optimizations were often sacrificed to conciseness.  For serious
calculations one should use the GNU Scientific Library.

The content of the book is free as in freedom. You are permitted to
copy and redistribute the book in original or modified form either
gratis or for a fee. However, you must attribute the original author(s)
and pass the same freedom to all recipients of your copies. See the GPL
and CC-BY-SA licenses for more details.

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\noindent 2013\\
\noindent Dmitri Fedorov\\
