On Wed, Apr 25, 2012 at 8:45 AM, Graham Gerrard <graham.gerr...@gmail.com> wrote: > Finding occasional inconsistencies when using matrices with cyclotomic > entries, though works well most of the time... > > sage: s=CyclotomicField(24,'s').gen() > sage: (8*s^6-1)^10 > -1098715216*s^6 - 372960063 > sage: xb=matrix(1,1,[8*s^6-1]) > sage: xb^10 > [1036922553*s^6 - 372960063] > > Above example is trivial computation, though problem recurs in several > contexts. I believe that scalar multiplication is correct and xb^10 > incorrect. Above example works OK when powers<10. > > Any suggestions?
This was already found and fixed (maybe by me?). E.g., in sage-5.0-pre15: sage: sage: s=CyclotomicField(24,'s').gen() sage: sage: (8*s^6-1)^10 -1098715216*s^6 - 372960063 sage: sage: xb=matrix(1,1,[8*s^6-1]) sage: sage: xb^10 [-1098715216*s^6 - 372960063] To sage-release: yet another reason to release Sage-5.0 *ASAP*. William > > Graham > > -- > To post to this group, send email to sage-support@googlegroups.com > To unsubscribe from this group, send email to > sage-support+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/sage-support > URL: http://www.sagemath.org -- William Stein Professor of Mathematics University of Washington http://wstein.org -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
