On Sun, Jul 22, 2012 at 1:19 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote:
> We recommend to people that they just call MatSetNullSpace() and solve the > singular system. What if reductions are very expensive? Are there Krylov > methods that accommodate a pipelined or deferred null space removal? > Shouldn't be hard to do, but I haven't seen papers on it. I think we have to figure out how to do this pipelined thing in a mechanical way (not necessarily automated, but done without thinking). You would think this had been figured out by the architecture guys. Matt -- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20120722/c2ac7d4d/attachment.html>
