On Thu, Sep 8, 2011 at 8:49 AM, Jason Grout <jason-s...@creativetrax.com> wrote: > On 9/8/11 10:30 AM, Dima Pasechnik wrote: >> >> we should also add that both A.solve_right and A.solve_left claim to >> solve Ax=b... > > > Yep. solve_left should be solve_right, IIRC. See > http://trac.sagemath.org/sage_trac/ticket/7852. I think this was an error > from when I did the RDF switch to a numpy backend. As you can see, Rob > posted a patch to fix it (and enhanced a few other things as well). > > Note that A2.solve_left(b) gives the same vector as A2.inverse()*b
So you made solve_left use the numpy backend and actually do solve_right, and left solve_right to use the generic Gauss elimination code, so neither is right. Trac 7852 really needs to get in. Release manager, merge that sucker. For the record, 7852 has a positive review and completely fixes the problem discussed in this thread. Rado, you could merge it on your server, maybe. William > > Thanks, > > Jason > > > -- > 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 > -- William Stein Professor of Mathematics University of Washington http://wstein.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
