Here's another one for you, Burcin...
Alex
sage: var('n',ns=1)
n
sage: (QQbar(2)^3)^n
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
/Users/arai021/<ipython console> in <module>()
/Applications/sage/local/lib/python2.5/site-packages/sage/rings/
qqbar.pyc in __pow__(self, e)
2808 1
2809 """
-> 2810 e = QQ._coerce_(e)
2811 n = e.numerator()
2812 d = e.denominator()
/Applications/sage/local/lib/python2.5/site-packages/sage/structure/
parent_old.so in sage.structure.parent_old.Parent._coerce_ (sage/
structure/parent_old.c:4031)()
/Applications/sage/local/lib/python2.5/site-packages/sage/structure/
parent.so in sage.structure.parent.Parent.coerce (sage/structure/
parent.c:4185)()
TypeError: no canonical coercion from New Symbolic Ring to Rational
Field
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