from sympy import QQ, S
from sympy.polys.agca.modules import FreeModule, ModuleOrder,
FreeModulePolyRing
from sympy.polys import CoercionFailed, QQ, lex, grlex, ilex, ZZ
from sympy.abc import x, y, z
from sympy.utilities.pytest import raises
x = Symbol('x')
y = Symbol('y')
z = Symbol('z')
R = QQ.old_poly_ring(x, y, z)
M =
R.free_module(1).submodule([1,x**2+y,x*y-y*z,0,0],[0,x*z-y,z-x,0,0],[0,0,0,x**2+y,x*y-y*z],[1,0,0,x*z-y,z-x])
MTest = M.syzygy_module()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Python27\lib\site-packages\sympy\polys\agca\modules.py", line
471, in
submodule
return SubModulePolyRing(gens, self, **opts)
File "C:\Python27\lib\site-packages\sympy\polys\agca\modules.py", line
1040, i
n __init__
SubModule.__init__(self, gens, container)
File "C:\Python27\lib\site-packages\sympy\polys\agca\modules.py", line
589, in
__init__
self.gens = tuple(container.convert(x) for x in gens)
File "C:\Python27\lib\site-packages\sympy\polys\agca\modules.py", line
589, in
<genexpr>
self.gens = tuple(container.convert(x) for x in gens)
File "C:\Python27\lib\site-packages\sympy\polys\agca\modules.py", line
349, in
convert
raise CoercionFailed
sympy.polys.polyerrors.CoercionFailed
>>> MTest = M.syzygy_module()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
NameError: name 'M' is not defined
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