NAG Library Manual, Mark 30.1
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Example description

nag_sparse_complex_gen_precon_bdilu (f11dtc) 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   7.21154e-03   4.80769e-03      34
        1    2  -2.50000e-01   6.25000e-02      35
        1    4  -3.26923e-01  -7.21154e-02      36
        2    1  -1.34615e-01   1.44231e-02      37
        2    2   7.51634e-03   4.87709e-03      38
        2    3  -2.57623e-01   6.78176e-02      39
        2    5  -3.38867e-01  -7.03465e-02      40
        3    2  -1.38967e-01   1.66383e-02      41
        3    3   7.52786e-03   4.87530e-03      42
        3    6  -3.39257e-01  -7.01208e-02      43
        4    1  -2.88462e-01  -4.80769e-03      44
        4    4   7.82358e-03   5.49946e-03      45
        4    5  -2.77460e-01   6.21296e-02      46
        5    2  -2.98245e-01  -1.26443e-03      47
        5    4  -1.48878e-01   1.22423e-02      48
        5    5   8.26388e-03   5.64193e-03      49
        5    6  -2.89400e-01   6.89668e-02      50
        6    3  -2.98536e-01  -1.00694e-03      51
        6    5  -1.55586e-01   1.49357e-02      52
        6    6   8.28693e-03   5.64169e-03      53
  C_2  -------------------------------------------
        1    1   7.21154e-03   4.80769e-03      54
        1    2  -2.50000e-01   6.25000e-02      55
        1    4  -2.88462e-01  -4.80769e-03      56
        1    5  -3.26923e-01  -7.21154e-02      57
        2    1  -1.34615e-01   1.44231e-02      58
        2    2   7.51634e-03   4.87709e-03      59
        2    3  -2.57623e-01   6.78176e-02      60
        2    6  -2.98245e-01  -1.26443e-03      61
        2    7  -3.38867e-01  -7.03465e-02      62
        3    2  -1.38967e-01   1.66383e-02      63
        3    3   7.52786e-03   4.87530e-03      64
        3    8  -2.98536e-01  -1.00694e-03      65
        3    9  -3.39257e-01  -7.01208e-02      66
        4    1  -3.26923e-01  -7.21154e-02      67
        4    4   7.82358e-03   5.49946e-03      68
        4    6  -2.77460e-01   6.21296e-02      69
        5    1  -2.88462e-01  -4.80769e-03      70
        5    5   7.82358e-03   5.49946e-03      71
        5    7  -2.77460e-01   6.21296e-02      72
        6    2  -3.38867e-01  -7.03465e-02      73
        6    4  -1.48878e-01   1.22423e-02      74
        6    6   8.26388e-03   5.64193e-03      75
        6    8  -2.89400e-01   6.89668e-02      76
        7    2  -2.98245e-01  -1.26443e-03      77
        7    5  -1.48878e-01   1.22423e-02      78
        7    7   8.26388e-03   5.64193e-03      79
        7    9  -2.89400e-01   6.89668e-02      80
        8    3  -3.39257e-01  -7.01208e-02      81
        8    6  -1.55586e-01   1.49357e-02      82
        8    8   8.28693e-03   5.64169e-03      83
        9    3  -2.98536e-01  -1.00694e-03      84
        9    7  -1.55586e-01   1.49357e-02      85
        9    9   8.28693e-03   5.64169e-03      86
  C_3  -------------------------------------------
        1    1   7.21154e-03   4.80769e-03      87
        1    2  -2.50000e-01   6.25000e-02      88
        1    4  -2.88462e-01  -4.80769e-03      89
        2    1  -1.34615e-01   1.44231e-02      90
        2    2   7.51634e-03   4.87709e-03      91
        2    3  -2.57623e-01   6.78176e-02      92
        2    5  -2.98245e-01  -1.26443e-03      93
        3    2  -1.38967e-01   1.66383e-02      94
        3    3   7.52786e-03   4.87530e-03      95
        3    6  -2.98536e-01  -1.00694e-03      96
        4    1  -3.26923e-01  -7.21154e-02      97
        4    4   7.82358e-03   5.49946e-03      98
        4    5  -2.77460e-01   6.21296e-02      99
        5    2  -3.38867e-01  -7.03465e-02     100
        5    4  -1.48878e-01   1.22423e-02     101
        5    5   8.26388e-03   5.64193e-03     102
        5    6  -2.89400e-01   6.89668e-02     103
        6    3  -3.39257e-01  -7.01208e-02     104
        6    5  -1.55586e-01   1.49357e-02     105
        6    6   8.28693e-03   5.64169e-03     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
  --------------------------------------