hi, I am wondering whether all the MatMat*() only are suitable for sequential matrix. I know MatMatSolve() is for sequential matrix. How about MatMatMult()? Thanks a lot. Regards, Yujie -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20080225/b56d2153/attachment.htm>