# MATMPIBAIJ#

MATMPIBAIJ = “mpibaij” - A matrix type to be used for distributed block sparse matrices.

## Options Database Keys#

• -mat_type mpibaij - sets the matrix type to MATMPIBAIJ during a call to MatSetFromOptions()

• -mat_block_size - set the blocksize used to store the matrix

• -mat_baij_mult_version version - indicate the version of the matrix-vector product to use (0 often indicates using BLAS)

• -mat_use_hash_table - set hash table factor

## Note#

MatSetOptions(,MAT_STRUCTURE_ONLY,PETSC_TRUE) may be called for this matrix type. In this no space is allocated for the nonzero entries and any entries passed with MatSetValues() are ignored

MATBAIJ, MATSEQBAIJ, MatCreateBAIJ