Thanks for the info. Quoting Hong Zhang <hzhang at mcs.anl.gov>:
> > petsc supports many sparse matrix storage formats, in which > aij for compressed sparse row format > baij for block compressed sparse row format > sbaij for symmetric block compressed sparse row format. > When block size bs=1, baij format is same as aij, > and sbaij format is same as aij without storing the > lower triangular entries. > > Hong > > On Wed, 8 Nov 2006 billy at dem.uminho.pt wrote: > > > > > What does the block size mean? > > > > Billy. > > > > Quoting Hong Zhang <hzhang at mcs.anl.gov>: > > > > > > > > MatCreateMPIAIJ -> MatCreateMPISBAIJ (symmetric) with block size bs=1. > > > > > > Hong > > > > > > On Wed, 8 Nov 2006 billy at dem.uminho.pt wrote: > > > > > > > > > > > Hi, > > > > > > > > > > > > I am currently using MatCreateMPIAIJ type matrices. Is there a > symmetric > > > version > > > > of this type? > > > > > > > > Like: > > > > > > > > MatCreateMPIBAIJ (non-symmetric) -> MatCreateMPISBAIJ (symmetric). > > > > > > > > MatCreateMPIAIJ (non-symmetric) -> MatCreateMPISAIJ (symmetric) ?? > > > > > > > > Billy. > > > > > > > > > > > > > > > > > > > > > >
