Hi,
First of all, I don't know whether to post about this here, or file a
bug report, or something else. I'm new to community developed
software. Let me know if this isn't the right place to report the
following.
I'm using sage 2.9.2 and 2.9.3 on different (both PPC) machines, both
running OS X 10.4.
Consider the following commands which should expand an elementary
symmetric function as a polynomial in 3 variables:
########
# Code
########
sage: k=SFAElementary(QQ)
sage: f=k([2])
sage: f.expand(3)
---------------------------------------------------------------------------
<type 'exceptions.TypeError'> Traceback (most recent call
last)
/Users/bjones/<ipython console> in <module>()
/Applications/sage/local/lib/python2.5/site-packages/sage/combinat/
sfa.py in expand(self, n, alphabet)
1041 #if len(part) > n:
1042 # continue
-> 1043 res += self_mc[part] * resPR(e(part, n, alphabet))
1044 return res
1045
/Users/bjones/multi_polynomial_libsingular.pyx in
sage.rings.polynomial.multi_polynomial_libsingular.MPolynomialRing_libsingular.__call__()
/Users/bjones/multi_polynomial.pyx in
sage.rings.polynomial.multi_polynomial.MPolynomial._polynomial_()
/Users/bjones/multi_polynomial_libsingular.pyx in
sage.rings.polynomial.multi_polynomial_libsingular.MPolynomialRing_libsingular.__call__()
/Applications/sage/local/lib/python2.5/site-packages/sage/rings/
rational_field.py in __call__(self, x, base)
180 if isinstance(x, sage.rings.rational.Rational):
181 return x
--> 182 return sage.rings.rational.Rational(x, base)
183
184 def construction(self):
/Users/bjones/rational.pyx in sage.rings.rational.Rational.__init__()
/Users/bjones/rational.pyx in
sage.rings.rational.Rational.__set_value()
/Users/bjones/polynomial_element.pyx in
sage.rings.polynomial.polynomial_element.Polynomial._rational_()
<type 'exceptions.TypeError'>: cannot coerce nonconstant polynomial
########
# End
########
Similar commands, but on objects from SFASchur, SFAPower, SFAMonomial,
etc.., work perfectly. It seems to be only SFAElementary that has a
problem.
Thanks,
BFJ
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