The book "Accuracy and stability of numerical algorithms" discusses all kinds of practical questions regarding numerical calculations. A "must" for anybody involved in this area, according to one (indepdendent) reader.

Author: Nicholas J. Higham
SIAM, Philadelphia, 1996, ISBN 0-89871-355-2 

Recently, a second edition has appeared.
[LV] Is Tcl a topic in the book, or is it of interest on the basis of the mathematics discussed?
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