Links for pyroots
pyroots-0.1.0.tar.gz
http://bitbucket.org/pmav99/pyroots/
http://en.wikipedia.org/wiki/Bisection_method
http://en.wikipedia.org/wiki/Brent%27s_method
http://en.wikipedia.org/wiki/Ridders%27_method
http://pyroots.readthedocs.org