<v, Krein array>
<2556, [ 70, 15123/242, 71/7, 1, 497/242, 426/7 ]>

P =
[   1  770  630 1155]
[   1  131   -9 -123]
[   1   -1   -9    9]
[   1  -22   54  -33]

Q =
[      1      70    2130     355]
[      1  131/11 -213/77   -71/7]
[      1      -1  -213/7   213/7]
[      1  -82/11 1278/77   -71/7]

L = 
[
    [1 0 0 0]
    [0 1 0 0]
    [0 0 1 0]
    [0 0 0 1],

    [  0 770   0   0]
    [  1 310 189 270]
    [  0 231 176 363]
    [  0 180 198 392],

    [  0   0 630   0]
    [  0 189 144 297]
    [  1 176 189 264]
    [  0 198 144 288],

    [   0    0    0 1155]
    [   0  270  297  588]
    [   0  363  264  528]
    [   1  392  288  474]
]

L* =
[
    [1 0 0 0]
    [0 1 0 0]
    [0 0 1 0]
    [0 0 0 1],

    [         0         70          0          0]
    [         1   1575/242  15123/242          0]
    [         0    497/242 97919/1694       71/7]
    [         0          0      426/7       64/7],

    [             0              0           2130              0]
    [             0      15123/242 20856747/11858       15123/49]
    [             1     97919/1694 21020757/11858       14626/49]
    [             0          426/7       87756/49       13632/49],

    [       0        0        0      355]
    [       0        0 15123/49  2272/49]
    [       0     71/7 14626/49  2272/49]
    [       1     64/7 13632/49  3266/49]
]