Good day,
Why does the following code give a valueerror (sympy 0.7.3 windows)?
from sympy import symbols, integrate
x,y,C1,C2,C3 = symbols('x y C1 C2 C3')
aa = -24596.7477524977*C1*x - 24596.7477524977*C2*y - 24596.7477524977*C3 -
11284722.2222222*(C1*x + C2*y + C3)**2
print integrate(aa,x)
Best regards,
George
~~~~~~~~~~~~~~~~~~~~~Output of last call~~~~~~~~~~~~~~~~
File "C:\Python27\lib\site-packages\sympy\integrals\integrals.py", line
1154,
in _eval_integral
return poly.integrate().as_expr()
File "C:\Python27\lib\site-packages\sympy\polys\polytools.py", line 2126,
in i
ntegrate
f = f.to_field()
File "C:\Python27\lib\site-packages\sympy\polys\polytools.py", line 677,
in to
_field
result = f.rep.to_field()
File "C:\Python27\lib\site-packages\sympy\polys\polyclasses.py", line
267, in
to_field
return f.convert(f.dom.get_field())
File "C:\Python27\lib\site-packages\sympy\polys\polyclasses.py", line
278, in
convert
return DMP(dmp_convert(f.rep, f.lev, f.dom, dom), dom, f.lev)
File "C:\Python27\lib\site-packages\sympy\polys\densebasic.py", line 576,
in d
mp_convert
return dup_convert(f, K0, K1)
File "C:\Python27\lib\site-packages\sympy\polys\densebasic.py", line 550,
in d
up_convert
return dup_strip([ K1.convert(c, K0) for c in f ])
File "C:\Python27\lib\site-packages\sympy\polys\domains\domain.py", line
94, i
n convert
return self.convert_from(element, base)
File "C:\Python27\lib\site-packages\sympy\polys\domains\domain.py", line
84, i
n convert_from
result = _convert(element, base)
File
"C:\Python27\lib\site-packages\sympy\polys\domains\old_fractionfield.py",
line 91, in from_GlobalPolynomialRing
return K1(a.rep)
File "C:\Python27\lib\site-packages\sympy\polys\domains\domain.py", line
69, i
n __call__
return self.new(*args)
File
"C:\Python27\lib\site-packages\sympy\polys\domains\old_fractionfield.py",
line 34, in new
return self.dtype(element, self.dom, len(self.gens) - 1, ring=self)
File "C:\Python27\lib\site-packages\sympy\polys\polyclasses.py", line
1013, in
__init__
num, den = dmp_cancel(num, den, lev, dom)
File "C:\Python27\lib\site-packages\sympy\polys\euclidtools.py", line
1907, in
dmp_cancel
_, p, q = dmp_inner_gcd(f, g, u, K)
File "C:\Python27\lib\site-packages\sympy\polys\euclidtools.py", line
1618, in
dmp_inner_gcd
h, cff, cfg = _dmp_inner_gcd(f, g, u, K)
File "C:\Python27\lib\site-packages\sympy\polys\euclidtools.py", line
1582, in
_dmp_inner_gcd
return dmp_ff_prs_gcd(f, g, u, K)
File "C:\Python27\lib\site-packages\sympy\polys\euclidtools.py", line
1166, in
dmp_ff_prs_gcd
result = _dmp_ff_trivial_gcd(f, g, u, K)
File "C:\Python27\lib\site-packages\sympy\polys\euclidtools.py", line
989, in
_dmp_ff_trivial_gcd
return _dmp_simplify_gcd(f, g, u, K)
File "C:\Python27\lib\site-packages\sympy\polys\euclidtools.py", line
1011, in
_dmp_simplify_gcd
F = dmp_content(f, u, K)
File "C:\Python27\lib\site-packages\sympy\polys\euclidtools.py", line
1832, in
dmp_content
cont = dmp_gcd(cont, c, v, K)
File "C:\Python27\lib\site-packages\sympy\polys\euclidtools.py", line
1660, in
dmp_gcd
return dmp_inner_gcd(f, g, u, K)[0]
File "C:\Python27\lib\site-packages\sympy\polys\euclidtools.py", line
1618, in
dmp_inner_gcd
h, cff, cfg = _dmp_inner_gcd(f, g, u, K)
File "C:\Python27\lib\site-packages\sympy\polys\euclidtools.py", line
1582, in
_dmp_inner_gcd
return dmp_ff_prs_gcd(f, g, u, K)
File "C:\Python27\lib\site-packages\sympy\polys\euclidtools.py", line
1174, in
dmp_ff_prs_gcd
h = dmp_subresultants(F, G, u, K)[-1]
File "C:\Python27\lib\site-packages\sympy\polys\euclidtools.py", line
570, in
dmp_subresultants
return dmp_inner_subresultants(f, g, u, K)[0]
File "C:\Python27\lib\site-packages\sympy\polys\euclidtools.py", line
517, in
dmp_inner_subresultants
h = dmp_prem(f, g, u, K)
File "C:\Python27\lib\site-packages\sympy\polys\densearith.py", line
1252, in
dmp_prem
c = dmp_pow(lc_g, N, u - 1, K)
File "C:\Python27\lib\site-packages\sympy\polys\densearith.py", line 988,
in d
mp_pow
raise ValueError("can't raise polynomial to a negative power")
ValueError: can't raise polynomial to a negative power
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