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. 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