Hi All,
I'm running 2.7.1 in OS X. In trying to compute a certain
discriminant, I ran into the following error:
sage: K.<t> = NumberField(x^3 + x^2 - 2*x + 8)
sage: b = K.integral_basis()
sage: b
[1, t, 1/2*t^2 + 1/2*t]
sage: K.disc()
-503
sage: b2 = [1, t, t^2]
sage: K.disc(b2)
---------------------------------------------------------------------------
<type 'exceptions.NameError'> Traceback (most recent call
last)
/Users/neal/<ipython console> in <module>()
/Applications/sage-2.7.1/local/lib/python2.5/site-packages/sage/rings/
number_field/number_field.py in discriminant(self, v)
482 return self.__disc
483 else:
--> 484 return Q(self.trace_pairing(v).det())
485
486 disc = discriminant
<type 'exceptions.NameError'>: global name 'Q' is not defined
Now, I immediately saw from line 484 that I only had to call
K.trace_pairing(b2).det() to get what I wanted:
sage: K.trace_pairing(b2).det()
-2012
But what is Q supposed to be there?
Neal Harris
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