Issue 1182: global variable 'cubic' undefined in sympy/polys/rootfinding.py
http://code.google.com/p/sympy/issues/detail?id=1182
Comment #6 by nicolas.pourcelot:
For example:
>>> import sympy
>>> sympy.var("x")
>>> p=(30.0 + 25.0*x**2 + 11.0*x**4 + 5.0*x**6 + x**8).as_poly()
>>> sympy.rootfinding.roots(p,cubic=True,quartics=True)
Traceback (most recent call last):
File "<input>", line 1, in <module>
File ".../sympy/polys/rootfinding.py", line 258, in roots
for zero in roots_trivial(h):
File ".../sympy/polys/rootfinding.py", line 228, in roots_trivial
zeros += roots_quartic(g)
File ".../sympy/polys/rootfinding.py", line 73, in roots_quartic
r = cubic(1, p, q, r)
NameError: global name 'cubic' is not defined
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