Dear all,
in the error message below, it seems that at some point a wrong
representation string is created, thus it the complex field is not able
to parse anymore.
Unfortunately, this went wrong once in a computation that started with a
random graph, so I cannot reproduce it anymore or narrow it down.
Does someone have a glue what could case this? Something on the Singular
interface?
Best
Daniel
Traceback (most recent call last):
File "/home/sci/egaar/Desktop/Sheet2_Sage/Sh2Ex4_3C.sage.py", line
195, in <module>
GB = PMIdeal.groebner_basis();
File "sage/misc/cachefunc.pyx", line 2038, in
sage.misc.cachefunc.CachedMethodCaller.__call__
(/local/sage/sage-7.4/src/build/cythonized/sage/misc/cachefunc.c:10184)
File "sage/misc/cachefunc.pyx", line 1914, in
sage.misc.cachefunc.CachedMethodCaller._instance_call
(/local/sage/sage-7.4/src/build/cythonized/sage/misc/cachefunc.c:9648)
File
"/local/cheuberg/sage/sage-7.4/local/lib/python2.7/site-packages/sage/rings/polynomial/multi_polynomial_ideal.py",
line 3729, in groebner_basis
gb = self._groebner_basis_singular("groebner", deg_bound=deg_bound,
mult_bound=mult_bound, *args, **kwds)
File
"/local/cheuberg/sage/sage-7.4/local/lib/python2.7/site-packages/sage/interfaces/singular.py",
line 2688, in wrapper
return func(*args, **kwds)
File
"/local/cheuberg/sage/sage-7.4/local/lib/python2.7/site-packages/sage/rings/polynomial/multi_polynomial_ideal.py",
line 1366, in _groebner_basis_singular
S = PolynomialSequence([R(S[i+1]) for i in range(len(S))], R,
immutable=True)
File
"/local/cheuberg/sage/sage-7.4/local/lib/python2.7/site-packages/sage/rings/polynomial/multi_polynomial_ring.py",
line 481, in __call__
return x.sage_poly(self)
File
"/local/cheuberg/sage/sage-7.4/local/lib/python2.7/site-packages/sage/interfaces/singular.py",
line 1752, in sage_poly
sage_repr[ETuple(exp,ngens)]=k(singular_poly_list[coeff_start+i])
File
"/local/cheuberg/sage/sage-7.4/local/lib/python2.7/site-packages/sage/rings/complex_field.py",
line 352, in __call__
return Parent.__call__(self, x)
File "sage/structure/parent.pyx", line 953, in
sage.structure.parent.Parent.__call__
(/local/sage/sage-7.4/src/build/cythonized/sage/structure/parent.c:9127)
File "sage/structure/coerce_maps.pyx", line 110, in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_
(/local/sage/sage-7.4/src/build/cythonized/sage/structure/coerce_maps.c:4563)
File "sage/structure/coerce_maps.pyx", line 105, in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_
(/local/sage/sage-7.4/src/build/cythonized/sage/structure/coerce_maps.c:4451)
File
"/local/cheuberg/sage/sage-7.4/local/lib/python2.7/site-packages/sage/rings/complex_field.py",
line 378, in _element_constructor_
sage_eval(x.replace(' ',''), locals={"I":self.gen(),"i":self.gen()}))
File
"/local/cheuberg/sage/sage-7.4/local/lib/python2.7/site-packages/sage/misc/sage_eval.py",
line 201, in sage_eval
return eval(source, sage.all.__dict__, locals)
File "<string>", line 1
RealNumber('0.')455197446584888e+-Integer(804007266)
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