#4780: relative number field constructor -- error message when given poly of
degree < 1 is bad
---------------------------+------------------------------------------------
Reporter: was | Owner: was
Type: defect | Status: new
Priority: major | Milestone: sage-3.2.2
Component: number theory | Keywords:
---------------------------+------------------------------------------------
{{{
sage: K.<a> = NumberField(x^2 + 1)
sage: L.<b> = NumberField(K['y'](1))
---------------------------------------------------------------------------
PariError Traceback (most recent call
last)
/Users/wstein/sage/build/sage-3.2.2.alpha0/<ipython console> in <module>()
/Users/wstein/sage/build/sage-3.2.2.alpha0/local/lib/python2.5/site-
packages/sage/rings/number_field/number_field.pyc in
NumberField(polynomial, name, check, names, cache, embedding)
374
375 if isinstance(R, NumberField_generic):
--> 376 S = R.extension(polynomial, name, check=check)
377 if cache:
378 _nf_cache[key] = weakref.ref(S)
/Users/wstein/sage/build/sage-3.2.2.alpha0/local/lib/python2.5/site-
packages/sage/rings/number_field/number_field.pyc in extension(self, poly,
name, names, check, embedding)
2570 if name is None:
2571 raise TypeError, "the variable name must be
specified."
-> 2572 return NumberField_relative(self, poly, str(name),
check=check, embedding=embedding)
2573
2574 def factor(self, n):
/Users/wstein/sage/build/sage-3.2.2.alpha0/local/lib/python2.5/site-
packages/sage/rings/number_field/number_field.pyc in __init__(self, base,
polynomial, name, latex_name, names, check, embedding)
4567
4568 self.__pari_relative_polynomial = pari(str(polynomial_y))
-> 4569 self.__rnf =
self.__base_nf.rnfinit(self.__pari_relative_polynomial)
4570
4571 self.__base_field = base
/Users/wstein/sage/build/sage-3.2.2.alpha0/local/lib/python2.5/site-
packages/sage/libs/pari/gen.so in sage.libs.pari.gen._pari_trap
(sage/libs/pari/gen.c:38578)()
PariError: not a polynomial (38)
>
/Users/wstein/sage/build/sage-3.2.2.alpha0/gen.pyx(8050)sage.libs.pari.gen._pari_trap
(sage/libs/pari/gen.c:38578)()
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4780>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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