Hi,

On 29.09.2015 19:16, Matti Picus wrote:
The algorithms for cubics and quadratics come from Numerical Recipes
(3rd ed.), and the quartic problem is internally reduced to a cubic and
two quadratics, using well-known standard tricks.
Nice, wll documented code.
Just to be sure you are on safe ground, you took the *algorithms* but no *code* 
from Numerical Recipes, right? They are pretty clear about their licensing, see
http://www.nr.com/licenses/redistribute.html
This bit from the site might be relevant:
"We never give permission for Numerical Recipes source code to be posted on any 
public server, or distributed with any freeware or shareware package."
Matti

Yes, the code is original (written from scratch), only the algorithms come from the book.


 -J

-------------------------------------------------
Juha Jeronen, Ph.D.
juha.jero...@jyu.fi
University of Jyväskylä
Department of Mathematical Information Technology
-------------------------------------------------

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