On Jun 7, 4:19 pm, William Stein <wst...@gmail.com> wrote: > Hi Sage-Devel, > > I'm randomly running into segfaults when multiplying matrices over the > integers, in the course of doing basic modular symbols calculations. > For example, sometimes (but not always), this crashes: > > sage: M = ModularSymbols(389,sign=0).cuspidal_submodule().decomposition()[0]
I observed (once) on Sage 4.7.1 (Fedora 15 x64): sage: %time M = ModularSymbols(389,sign=0).cuspidal_submodule().decomposition()[0] ArithmeticError: subspace is not invariant under matrix I'm not able to reliably reproduce this error either. -- 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
