Hello, The actual issue was that I forgot to covert symmetrica's LONGINT type ( 22 ) over to the correct Sage type. I hadn't actually tested it with calculations that got up to numbers that big. I made a ticket for this and posted a patch: http://sagetrac.org/sage_trac/ticket/1445 It will be in the next version ( 2.9 ) which will come out in about 3 days.
--Mike On Dec 9, 2007 10:01 PM, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > I'm trying to use the combinatorics features in Sage to do some Chern > class calculations. When I run the commands below, I get exceptions > that I don't know how to interpret. > > The same calculation in Maple using John Stembridge's SF package > completes successfully using roughly 149 MB and 7.08 s CPU time. > > Is this just an issue of memory limitation? If so, can (and how do) I > lift the limitation to access more of the 2 GB I have on the machine > I'm running this on? > > code follows: > I'm using Sage 2.8.15 on an i386 Linux platform. I also tried this on > an Intel OS X 10.5 machine with the same result. Also, all the powers > of "f" from 1 to 7 work fine. f^8 and higher powers fail. > ----------------------------------- > > sage: s=SFASchur(QQ) > sage: f=s([2,1]); f > s[2, 1] > sage: f^8 > --------------------------------------------------------------------------- > <type 'exceptions.NotImplementedError'> Traceback (most recent call > last) > > /Users/benjaminjones/Desktop/sage-2.8.15-osx10.5-intel-i386-Darwin/ > <ipython console> in <module>() > > /Users/benjaminjones/Desktop/sage-2.8.15-osx10.5-intel-i386-Darwin/ > local/lib/python2.5/site-packages/sage/combinat/sfa.py in > __pow__(self, n) > 881 z = A(Integer(1)) > 882 for i in range(n): > --> 883 z *= self > 884 return z > 885 > > /Users/benjaminjones/Desktop/sage-2.8.15-osx10.5-intel-i386-Darwin/ > element.pyx in sage.structure.element.RingElement.__imul__() > > . > . > . > . > > /Users/benjaminjones/Desktop/sage-2.8.15-osx10.5-intel-i386-Darwin/ > symmetrica.pxi in sage.libs.symmetrica.symmetrica._py() > > <type 'exceptions.NotImplementedError'>: 22 > sage: > > > > > > > > --~--~---------~--~----~------------~-------~--~----~ 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://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/ -~----------~----~----~----~------~----~------~--~---
