On Apr 6, 8:32 pm, Nick Alexander <[EMAIL PROTECTED]> wrote: > On 6-Apr-08, at 11:10 AM, Franco Saliola wrote: > > > > > > > Hello Mike (H), > > > On Sun, Apr 6, 2008 at 5:46 AM, Mike Hansen <[EMAIL PROTECTED]> wrote: > > >> I'm not able to reproduce your bug. Here is what I get: > > > I am able to reproduce the bug (on an Intel machine; see below). > > >> sage: s = SFASchur(QQ) > >> sage: p = SFAPower(QQ) > >> sage: s(p(s([14]))) > >> s[14] > >> sage: a = s(p(s([14])))*s([14]) > >> sage: a > >> s[14, 14] + s[15, 13] + s[16, 12] + s[17, 11] + s[18, 10] + s[19, > >> 9] + > >> s[20, 8] + s[21, 7] + s[22, 6] + s[23, 5] + s[24, 4] + s[25, 3] + > >> s[26, 2] + s[27, 1] + s[28] > > > This is okay. > > >> sage: sage: s = SFASchur(QQ) > >> sage: s([14,14]).itensor(s([17,11])) > > > This is not. For example, > > > sage: c = s([14,14]).itensor(s([17,11])) > > sage: c.coefficients()[70] > > 42204149/896259893760 > > I get the same (rational) result as Franco. I am running 'SAGE > Version 2.11, Release Date: 2008-03-30' on > > $ uname -a > Darwin pv109059.reshsg.uci.edu 8.11.1 Darwin Kernel Version 8.11.1: > Wed Oct 10 18:23:28 PDT 2007; root:xnu-792.25.20~1/RELEASE_I386 i386 > i386 > > That's an Intel MacBook Pro, Core 2 duo, OS X 10.4.x.
This seems to be a 32 vs. 64 bit issue. On sage.math: ---------------------------------------------------------------------- | SAGE Version 3.0.alpha1, Release Date: 2008-04-04 | | Type notebook() for the GUI, and license() for information. | ---------------------------------------------------------------------- sage: s = SFASchur(QQ) sage: c = s([14,14]).itensor(s([17,11])) sage: c.coefficients()[70] 0 sage: Exiting SAGE (CPU time 18m6.83s, Wall time 25m14.11s). 18 minutes of CPU time translates to quite a long valgrind time, but if it is an overflow that won't catch it anyway. > Nick Cheers, Michael --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@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-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
