[petsc-dev] MATMPIAIJ and MATMPIBAIJ

[Satish Balay]

On Fri, 13 Sep 2013, Jose David Bermeol wrote:

> Hi it may be a silly question, but what is the difference between MATMPIAIJ and MATMPIBAIJ, the manual is a bit technical, so if you could answer in simple words or maybe with an example would be great.

sparse matrix vs 'block' sparse matrix.

Internal representation is (row,col,val)   vs (block-row, block-col, block-of-values [say 2x2 = 4 values])

Satish