Like MatGetSubMatrix(), whether is there a function to get a subvector in parallel mode? I have checked some scatter functios, they don't likely work. thanks a lot. Regards, Yujie -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20090102/13f65b6a/attachment.htm>