Bibliography

GP
PARI/GP http://pari.math.u-bordeaux.fr/

Ip
The IPython shell http://ipython.scipy.org/

Ma
http://magma.maths.usyd.edu.au/magma/

Py
The Python language http://www.python.org/
Reference Manual http://docs.python.org/ref/ref.html

SA
SAGE website http://www.math.harvard.edu/SAGE/.

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