8   Mat         C, A;  in main()  local
16   PetscCall(MatCreate(PETSC_COMM_WORLD, &C));  in main()
17   PetscCall(MatSetSizes(C, PETSC_DECIDE, PETSC_DECIDE, 3, 3));  in main()
18   PetscCall(MatSetFromOptions(C));  in main()
19   PetscCall(MatSetUp(C));  in main()
24   PetscCall(MatSetValues(C, 1, &i, 1, &j, &v, INSERT_VALUES));  in main()
28   PetscCall(MatSetValues(C, 1, &i, 1, &j, &v, INSERT_VALUES));  in main()
32   PetscCall(MatSetValues(C, 1, &i, 1, &j, &v, INSERT_VALUES));  in main()
36   PetscCall(MatSetValues(C, 1, &i, 1, &j, &v, INSERT_VALUES));  in main()
40   PetscCall(MatSetValues(C, 1, &i, 1, &j, &v, INSERT_VALUES));  in main()
42   PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY));  in main()
43   PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY));  in main()
45   PetscCall(MatView(C, PETSC_VIEWER_STDOUT_WORLD));  in main()
48   PetscCall(PCSetOperators(pc, C, C));  in main()
55   PetscCall(MatDestroy(&C));  in main()