On Dec 30, 2008, at 3:27 PM, Yujie wrote: > Dear Barry: > > thank you for your reply. MatMatMult() uses Plapcak package for > Dense matrices? > In the parallel case, for sequential it uses LAPACK > > In addition, about MatGetSubMatrix() and submatrix multiplcation > problems, could you give me some advice? > > "if the distribution of A11 and B is different, it will not work if > I do B*A11? if it work, what is the distribution of B*A11?" >
The row ownership of B and the column ownership of A11 > thanks a lot. Happy holiday:). > > Regards, > > Yujie > > > > > > On Tue, Dec 30, 2008 at 12:28 PM, Barry Smith <bsmith at mcs.anl.gov> > wrote: > > In theory it is all there. Just do MatMatMult() with your dense > matrices > > Barry > > > On Dec 29, 2008, at 1:55 PM, Yujie wrote: > > Hi, > > I am wondering whether it have been realized in PETSc to do > MPIDense*MPIDense? thanks a lot. Happy holiday:). > > Regards, > > Yujie > > >
