See http://trac.sagemath.org/sage_trac/ticket/4266
On Oct 10, 2008, at 4:14 PM, mabshoff wrote: > > > > On Oct 10, 4:04 pm, john_perry_usm <[EMAIL PROTECTED]> wrote: >> Try adding another 1. Apparently I copied & pasted the wrong one. >> > > I can reproduce it on a 64 bit box: > > sage: > round(sqrt > (111111111111111111111111111111111111111111111111111111111111111111111 > 1111111111111111111111111111111111111111111111111111111111111111111111 > 1111111111111111111111111111111111111111111111 > 1111111111111111111111111111111111111111111111111111111111111111111111 > 111111111111111111111111111111111111111111111111111111)) > 1.05409255339e+154 > sage: > round(sqrt > (111111111111111111111111111111111111111111111111111111111111111111111 > 1111111111111111111111111111111111111111111111111111111111111111111111 > 1111111111111111111111111111111111111111111111 > 1111111111111111111111111111111111111111111111111111111111111111111111 > 1111111111111111111111111111111111111111111111111111111)) > ---------------------------------------------------------------------- > ----- > OverflowError Traceback (most recent call > last) > > /scratch/mabshoff/release-cycle/sage-3.1.3.rc0/<ipython console> in > <module>() > > /scratch/mabshoff/release-cycle/sage-3.1.3.rc0/local/lib/python2.5/ > site-packages/sage/misc/functional.pyc in round(x, ndigits) > 845 else: > 846 try: return x.round() > --> 847 except AttributeError: return > RealDoubleElement(__builtin__.round(x, 0)) > 848 > 849 def quotient(x, y, *args, **kwds): > > /scratch/mabshoff/release-cycle/sage-3.1.3.rc0/local/lib/python2.5/ > site-packages/sage/calculus/calculus.pyc in __float__(self) > 6201 f = self._operands[0] > 6202 g = self._operands[1] > -> 6203 return float(f._approx_(float(g))) > 6204 > 6205 def _fast_float_(self, *vars): > > /scratch/mabshoff/release-cycle/sage-3.1.3.rc0/local/lib/python2.5/ > site-packages/sage/calculus/calculus.pyc in _approx_(self, x) > 7978 > 7979 def _approx_(self, x): > -> 7980 return math.sqrt(x) > 7981 > 7982 sqrt = Function_sqrt() > > OverflowError: math range error > > The issue seems to be that RealDoubleElement() cannot deal with a > value that large since it overflows the range that float provides. > > Cheers, > > Michael > > --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
