NAG Library Manual, Mark 28.4
```
nag_sparse_real_gen_precon_bdilu (f11dfc) Example Program Results

Original Matrix
n     =    9
nnz   =   33
nb    =    3
Block =    1,       order =    6,    start row =    1
Block =    2,       order =    9,    start row =    1
Block =    3,       order =    6,    start row =    4

Factorization
nnzc  =   73

Elements of factorization
i    j           c(i,j)   Index
C_1  --------------------------------
1    1      1.56250e-02      34
1    2     -3.12500e-01      35
1    4     -3.12500e-01      36
2    1     -1.87500e-01      37
2    2      1.65975e-02      38
2    3     -3.31950e-01      39
2    5     -3.31950e-01      40
3    2     -1.99170e-01      41
3    3      1.66621e-02      42
3    6     -3.33241e-01      43
4    1     -1.87500e-01      44
4    4      1.65975e-02      45
4    5     -3.31950e-01      46
5    2     -1.99170e-01      47
5    4     -1.99170e-01      48
5    5      1.78466e-02      49
5    6     -3.56931e-01      50
6    3     -1.99945e-01      51
6    5     -2.14159e-01      52
6    6      1.79475e-02      53
C_2  --------------------------------
1    1      1.56250e-02      54
1    2     -3.12500e-01      55
1    4     -1.87500e-01      56
1    5     -3.12500e-01      57
2    1     -1.87500e-01      58
2    2      1.65975e-02      59
2    3     -3.31950e-01      60
2    6     -1.99170e-01      61
2    7     -3.31950e-01      62
3    2     -1.99170e-01      63
3    3      1.66621e-02      64
3    8     -1.99945e-01      65
3    9     -3.33241e-01      66
4    1     -3.12500e-01      67
4    4      1.65975e-02      68
4    6     -3.31950e-01      69
5    1     -1.87500e-01      70
5    5      1.65975e-02      71
5    7     -3.31950e-01      72
6    2     -3.31950e-01      73
6    4     -1.99170e-01      74
6    6      1.78466e-02      75
6    8     -3.56931e-01      76
7    2     -1.99170e-01      77
7    5     -1.99170e-01      78
7    7      1.78466e-02      79
7    9     -3.56931e-01      80
8    3     -3.33241e-01      81
8    6     -2.14159e-01      82
8    8      1.79475e-02      83
9    3     -1.99945e-01      84
9    7     -2.14159e-01      85
9    9      1.79475e-02      86
C_3  --------------------------------
1    1      1.56250e-02      87
1    2     -3.12500e-01      88
1    4     -1.87500e-01      89
2    1     -1.87500e-01      90
2    2      1.65975e-02      91
2    3     -3.31950e-01      92
2    5     -1.99170e-01      93
3    2     -1.99170e-01      94
3    3      1.66621e-02      95
3    6     -1.99945e-01      96
4    1     -3.12500e-01      97
4    4      1.65975e-02      98
4    5     -3.31950e-01      99
5    2     -3.31950e-01     100
5    4     -1.99170e-01     101
5    5      1.78466e-02     102
5    6     -3.56931e-01     103
6    3     -3.33241e-01     104
6    5     -2.14159e-01     105
6    6      1.79475e-02     106

Details of factorized blocks
k   i     istr(i)   idiag(i)    indb(i)
1   1         34         34          1
2         37         38          2
3         41         42          3
4         44         45          4
5         47         49          5
6         51         53          6
---------------------------------------
2   7         54         54          4
8         58         59          5
9         63         64          6
10         67         68          1
11         70         71          7
12         73         75          2
13         77         79          8
14         81         83          3
15         84         86          9
---------------------------------------
3  16         87         87          7
17         90         91          8
18         94         95          9
19         97         98          4
20        100        102          5
21        104        106          6
---------------------------------------
```