It can also be very expensive to test elements of QQbar for equality. John
On Sat, Jun 25, 2011 at 11:39 AM, Dima Pasechnik <dimp...@gmail.com> wrote: > > > On Jun 25, 7:15 am, Rob Beezer <goo...@beezer.cotse.net> wrote: >> I've seen sporadic hangs when working with matrices of algebraic >> numbers. Despite my great love for QQbar, this has dampened my >> enthusiasm somewhat, though maybe that is hard to recognize. It got >> so bad today, I went digging. >> >> Short answer: not very hard to find algebraic numbers that can take a >> full minute to hash. I think I can workaround the hash in the matrix >> printing code, though it will still not save printing matrices with >> just +/- signs for algebraic numbers when positive and negative. > > Do you mean "real algebraic numbers" ? > So the code in question actually computes these numbers to a high > precision, no? > > >> >> Long answer:http://trac.sagemath.org/sage_trac/ticket/11543 >> >> Rob > > -- > To post to this group, send an email to sage-devel@googlegroups.com > To unsubscribe from this group, send an email to > sage-devel+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/sage-devel > URL: http://www.sagemath.org > -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
