id summary reporter owner description type status priority milestone component resolution keywords cc work_issues upstream reviewer author merged dependencies stopgaps 9595 Conversion from constant PARI polynomials to QQ doesn't work jdemeyer robertwb "We create a constant PARI polynomial with value 1/2 and coerce it to QQ: {{{ sage: constpol = pari('Pol([1/2])') sage: QQ(constpol) --------------------------------------------------------------------------- TypeError Traceback (most recent call last) /usr/local/src/sage-4.5.2.alpha0/ in () /usr/local/src/sage-4.5.2.alpha0/local/lib/python2.6/site-packages/sage/structure/parent.so in sage.structure.parent.Parent.__call__ (sage/structure/parent.c:6407)() /usr/local/src/sage-4.5.2.alpha0/local/lib/python2.6/site-packages/sage/structure/coerce_maps.so in sage.structure.coerce_maps.DefaultConvertMap_unique._call_ (sage/structure/coerce_maps.c:3108)() /usr/local/src/sage-4.5.2.alpha0/local/lib/python2.6/site-packages/sage/structure/coerce_maps.so in sage.structure.coerce_maps.DefaultConvertMap_unique._call_ (sage/structure/coerce_maps.c:3010)() /usr/local/src/sage-4.5.2.alpha0/local/lib/python2.6/site-packages/sage/rings/rational.so in sage.rings.rational.Rational.__init__ (sage/rings/rational.c:5781)() /usr/local/src/sage-4.5.2.alpha0/local/lib/python2.6/site-packages/sage/rings/rational.so in sage.rings.rational.Rational.__set_value (sage/rings/rational.c:6853)() /usr/local/src/sage-4.5.2.alpha0/local/lib/python2.6/site-packages/sage/rings/integer.so in sage.rings.integer.Integer.__init__ (sage/rings/integer.c:6285)() TypeError: Unable to coerce PARI 1/2 to an Integer. }}} Note how the error message indicated conversion to Integer somehow. Indeed, {{{QQ(pari('Pol([1])'))}}} works" defect closed major sage-4.5.3 coercion fixed N/A John Cremona Jeroen Demeyer sage-4.5.3.alpha0