Hi all, I would like to solve a system Ax=b multiple times, with A and b stay the same from time to time. The difference among each time is that a set of DOFs in x are fixed and others are free to be solved. And the set of DOFs to be fixed/ solved varies from time to time. I know I can assemble A each time and move the set of fixed DOFs to the rhs. But I don't want to do this because the size of A is changing.
Is there a simpler and more automated way to deal with this issue? Thanks, Guanglei -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20130318/b9bb0cdf/attachment.html>
