MatCreateProd

Creates a matrix as the implicit product of zero or more matrices. This class is an adoption of MATCOMPOSITE type in PETSc.

PetscErrorCode  MatCreateProd(MPI_Comm comm,PetscInt nmat,const Mat *mats,Mat *mat)

Collective on MPI_Comm

- the matrix

Alternative construction

      MatCreate(comm,&mat);

      MatSetType(mat,MATPROD);

      MatCompositeAddMat(mat,mats[0]);

      ....

      MatCompositeAddMat(mat,mats[nmat-1]);

      MatAssemblyBegin(mat,MAT_FINAL_ASSEMBLY);

      MatAssemblyEnd(mat,MAT_FINAL_ASSEMBLY);

For the multiplicative form the product is mat[nmat-1]*mat[nmat-2]*....*mat[0]

advanced