In 3.4.2 I get this: sage: x = polygen(QQbar) sage: f = 3*x^4 - 4*x^3 - 1046148*x^2 - 335575956*x - 30288853512 sage: rts = f.roots(multiplicities=False) sage: [r.sqrt() for r in rts] --------------------------------------------------------------------------- AttributeError Traceback (most recent call last)
/home/jec/sage-4.3.2/devel/sage-tests/<ipython console> in <module>() /home/jec/sage-current/local/lib/python2.6/site-packages/sage/rings/qqbar.pyc in sqrt(self) 2449 0.7071067811865475? + 0.7071067811865475?*I 2450 """ -> 2451 return self.__pow__(~ZZ(2)) 2452 2453 def nth_root(self, n): /home/jec/sage-current/local/lib/python2.6/site-packages/sage/rings/qqbar.pyc in __pow__(self, e) 2953 isgn = self.imag().sign() 2954 val = self._value -> 2955 argument = val.argument() 2956 if isgn == 0: 2957 argument = argument.parent().pi() /home/jec/sage-current/local/lib/python2.6/site-packages/sage/structure/element.so in sage.structure.element.Element.__getattr__ (sage/structure/element.c:2725)() /home/jec/sage-current/local/lib/python2.6/site-packages/sage/structure/parent.so in sage.structure.parent.getattr_from_other_class (sage/structure/parent.c:2832)() /home/jec/sage-current/local/lib/python2.6/site-packages/sage/structure/parent.so in sage.structure.parent.raise_attribute_error (sage/structure/parent.c:2599)() AttributeError: 'sage.rings.real_mpfi.RealIntervalFieldElement' object has no attribute 'argument' sage: [r.sqrt() for r in rts] [26.89930078070870?, 15.64182427553343?*I, 0.10896562034989? - 15.45309240093827?*I, 0.10896562034989? + 15.45309240093827?*I] So the first time I evaluate the line [r.sqrt() for r in rts] I get an error but the second time it works. Any ideas? John -- To post to this group, send an email to [email protected] To unsubscribe from this group, send an email to [email protected] For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
