7   Mat         C, A;  in main()  local
19   PetscCall(MatCreate(PETSC_COMM_WORLD, &C));  in main()
20   PetscCall(MatSetSizes(C, PETSC_DECIDE, PETSC_DECIDE, m * n, m * n));  in main()
21   PetscCall(MatSetFromOptions(C));  in main()
22   PetscCall(MatSetUp(C));  in main()
28   PetscCall(MatGetOwnershipRange(C, &rstart, &rend));  in main()
32       PetscCall(MatSetValues(C, 1, &i, 1, &j, &v, INSERT_VALUES));  in main()
35   PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY));  in main()
36   PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY));  in main()
38   PetscCall(MatView(C, PETSC_VIEWER_STDOUT_WORLD));  in main()
44   PetscCall(MatGetOwnershipRange(C, &rstart, &rend));  in main()
45   PetscCall(MatGetOwnershipRangeColumn(C, &cstart, &cend));  in main()
49   PetscCall(MatCreateSubMatrix(C, isrow, NULL, MAT_INITIAL_MATRIX, &A));  in main()
56     PetscCall(MatSetValues(C, 1, &i, 1, &j, &v, INSERT_VALUES));  in main()
58   PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY));  in main()
59   PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY));  in main()
61   PetscCall(MatCreateSubMatrix(C, isrow, NULL, MAT_REUSE_MATRIX, &A));  in main()
69   PetscCall(MatDestroy(&C));  in main()