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Codimension 4 cyclic polytopes with details -- Constructing minimal resolutions for codimension 4 cyclic polytopes with details.

We give all the details of the unprojection construction for some codim 4 examples.

Δ(2,6):

i1 : R=QQ[x_1..x_6];
i2 : cc=cycRes(2,R,verbose=>2);

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

delta(2,{x_1, x_2, x_3, x_4, x_5})   +   delta(0,{z, x_2, x_3, x_4})   ->   delta(2,{x_1, x_2, x_3, x_4, x_5, x_6})

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res(I): 

a_1 = | x_2x_4 x_3x_5 x_1x_4 x_2x_5 x_1x_3 |

a_2 = {2} | 0    x_1  0    0    -x_5 |
      {2} | -x_1 0    x_2  0    0    |
      {2} | 0    -x_2 0    x_3  0    |
      {2} | 0    0    -x_3 0    x_4  |
      {2} | x_5  0    0    -x_4 0    |

a_3 = {3} | x_2x_4 |
      {3} | x_3x_5 |
      {3} | x_1x_4 |
      {3} | x_2x_5 |
      {3} | x_1x_3 |


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res(J): 

b_1 = | z x_3 x_4 x_2 |

b_2 = {1} | x_3 x_4 x_2 0    0    0    |
      {1} | -z  0   0   0    x_2  -x_4 |
      {1} | 0   -z  0   -x_2 0    x_3  |
      {1} | 0   0   -z  x_4  -x_3 0    |

b_3 = {2} | 0    x_2  -x_4 0   |
      {2} | -x_2 0    x_3  0   |
      {2} | x_4  -x_3 0    0   |
      {2} | z    0    0    x_3 |
      {2} | 0    z    0    x_4 |
      {2} | 0    0    z    x_2 |

b_4 = {3} | x_3 |
      {3} | x_4 |
      {3} | x_2 |
      {3} | -z  |

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phi: {z, x_3, x_4, x_2} -> {x_1*x_5, 0, 0, 0}

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alpha_1 = {1} | 0   0   0   0   0   |
          {1} | 0   x_5 0   0   x_1 |
          {1} | 0   0   x_1 0   0   |
          {1} | x_4 0   0   x_5 0   |

alpha_2 = {2} | 0 0   0   0   0 |
          {2} | 0 0   0   0   0 |
          {2} | 0 0   0   0   0 |
          {2} | 0 x_1 0   0   0 |
          {2} | 0 0   x_5 0   0 |
          {2} | 0 0   0   x_1 0 |

alpha_3 = {3} | 0      |
          {3} | 0      |
          {3} | 0      |
          {3} | x_1x_5 |


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beta_1 = | -x_1x_5 0 0 0 |

beta_2 = {2} | 0    0    0    0 0 0 |
         {2} | -x_1 0    0    0 0 0 |
         {2} | 0    -x_5 0    0 0 0 |
         {2} | 0    0    -x_1 0 0 0 |
         {2} | 0    0    0    0 0 0 |

beta_3 = {3} | 0    0    -x_4 0 |
         {3} | -x_5 0    0    0 |
         {3} | 0    -x_1 0    0 |
         {3} | 0    0    -x_5 0 |
         {3} | -x_1 0    0    0 |


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u = -1

------------------------------------------------------------------------------------------------------------------------

h_1 = 0

h_2 = 0

h_3 = 0


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f_1 = | x_2x_4 x_3x_5 x_1x_4 x_2x_5 x_1x_3 x_6z-x_1x_5 x_6x_3 x_6x_4 x_6x_2 |

f_2 = | 0    x_1  0    0    -x_5 0    0    0    0    0    0    x_6  0    0    0    0    |
      | -x_1 0    x_2  0    0    -x_1 0    0    0    0    0    0    x_6  0    0    0    |
      | 0    -x_2 0    x_3  0    0    -x_5 0    0    0    0    0    0    x_6  0    0    |
      | 0    0    -x_3 0    x_4  0    0    -x_1 0    0    0    0    0    0    x_6  0    |
      | x_5  0    0    -x_4 0    0    0    0    0    0    0    0    0    0    0    x_6  |
      | 0    0    0    0    0    -x_3 -x_4 -x_2 0    0    0    0    0    0    0    0    |
      | 0    0    0    0    0    z    0    0    0    -x_2 x_4  0    -x_5 0    0    -x_1 |
      | 0    0    0    0    0    0    z    0    x_2  0    -x_3 0    0    -x_1 0    0    |
      | 0    0    0    0    0    0    0    z    -x_4 x_3  0    -x_4 0    0    -x_5 0    |

f_3 = | 0    0    -x_4 0    -x_6 0    0    0    0    |
      | -x_5 0    0    0    0    -x_6 0    0    0    |
      | 0    -x_1 0    0    0    0    -x_6 0    0    |
      | 0    0    -x_5 0    0    0    0    -x_6 0    |
      | -x_1 0    0    0    0    0    0    0    -x_6 |
      | 0    -x_2 x_4  0    0    0    0    0    0    |
      | x_2  0    -x_3 0    0    0    0    0    0    |
      | -x_4 x_3  0    0    0    0    0    0    0    |
      | -z   0    0    -x_3 0    -x_1 0    0    0    |
      | 0    -z   0    -x_4 0    0    -x_5 0    0    |
      | 0    0    -z   -x_2 0    0    0    -x_1 0    |
      | 0    0    0    0    0    x_1  0    0    -x_5 |
      | 0    0    0    0    -x_1 0    x_2  0    0    |
      | 0    0    0    0    0    -x_2 0    x_3  0    |
      | 0    0    0    0    0    0    -x_3 0    x_4  |
      | 0    0    0    0    x_5  0    0    -x_4 0    |

f_4 = | -x_6x_3     |
      | -x_6x_4     |
      | -x_6x_2     |
      | x_6z-x_1x_5 |
      | x_2x_4      |
      | x_3x_5      |
      | x_1x_4      |
      | x_2x_5      |
      | x_1x_3      |


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Δ(4,8):

(this of course also contains in particular the above calculation)

i3 : R=QQ[x_1..x_8];
i4 : cc=cycRes(4,R,verbose=>2);

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

delta(2,{z, x_2, x_3, x_4, x_5})   +   delta(0,{z, x_2, x_3, x_4})   ->   delta(2,{z, x_2, x_3, x_4, x_5, x_6})

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res(I): 

a_1 = | x_2x_4 x_3x_5 zx_4 x_2x_5 zx_3 |

a_2 = {2} | 0   z    0    0    -x_5 |
      {2} | -z  0    x_2  0    0    |
      {2} | 0   -x_2 0    x_3  0    |
      {2} | 0   0    -x_3 0    x_4  |
      {2} | x_5 0    0    -x_4 0    |

a_3 = {3} | x_2x_4 |
      {3} | x_3x_5 |
      {3} | zx_4   |
      {3} | x_2x_5 |
      {3} | zx_3   |


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res(J): 

b_1 = | z x_3 x_4 x_2 |

b_2 = {1} | x_3 x_4 x_2 0    0    0    |
      {1} | -z  0   0   0    x_2  -x_4 |
      {1} | 0   -z  0   -x_2 0    x_3  |
      {1} | 0   0   -z  x_4  -x_3 0    |

b_3 = {2} | 0    x_2  -x_4 0   |
      {2} | -x_2 0    x_3  0   |
      {2} | x_4  -x_3 0    0   |
      {2} | z    0    0    x_3 |
      {2} | 0    z    0    x_4 |
      {2} | 0    0    z    x_2 |

b_4 = {3} | x_3 |
      {3} | x_4 |
      {3} | x_2 |
      {3} | -z  |

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phi: {z, x_3, x_4, x_2} -> {z*x_5, 0, 0, 0}

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alpha_1 = {1} | 0   0   0 0   0 |
          {1} | 0   x_5 0 0   z |
          {1} | 0   0   z 0   0 |
          {1} | x_4 0   0 x_5 0 |

alpha_2 = {2} | 0 0 0   0 0 |
          {2} | 0 0 0   0 0 |
          {2} | 0 0 0   0 0 |
          {2} | 0 z 0   0 0 |
          {2} | 0 0 x_5 0 0 |
          {2} | 0 0 0   z 0 |

alpha_3 = {3} | 0    |
          {3} | 0    |
          {3} | 0    |
          {3} | zx_5 |


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beta_1 = | -zx_5 0 0 0 |

beta_2 = {2} | 0  0    0  0 0 0 |
         {2} | -z 0    0  0 0 0 |
         {2} | 0  -x_5 0  0 0 0 |
         {2} | 0  0    -z 0 0 0 |
         {2} | 0  0    0  0 0 0 |

beta_3 = {3} | 0    0  -x_4 0 |
         {3} | -x_5 0  0    0 |
         {3} | 0    -z 0    0 |
         {3} | 0    0  -x_5 0 |
         {3} | -z   0  0    0 |


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u = -1

------------------------------------------------------------------------------------------------------------------------

h_1 = 0

h_2 = 0

h_3 = 0


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f_1 = | x_2x_4 x_3x_5 zx_4 x_2x_5 zx_3 x_6z-zx_5 x_6x_3 x_6x_4 x_6x_2 |

f_2 = | 0   z    0    0    -x_5 0    0    0    0    0    0    x_6  0    0   0    0   |
      | -z  0    x_2  0    0    -z   0    0    0    0    0    0    x_6  0   0    0   |
      | 0   -x_2 0    x_3  0    0    -x_5 0    0    0    0    0    0    x_6 0    0   |
      | 0   0    -x_3 0    x_4  0    0    -z   0    0    0    0    0    0   x_6  0   |
      | x_5 0    0    -x_4 0    0    0    0    0    0    0    0    0    0   0    x_6 |
      | 0   0    0    0    0    -x_3 -x_4 -x_2 0    0    0    0    0    0   0    0   |
      | 0   0    0    0    0    z    0    0    0    -x_2 x_4  0    -x_5 0   0    -z  |
      | 0   0    0    0    0    0    z    0    x_2  0    -x_3 0    0    -z  0    0   |
      | 0   0    0    0    0    0    0    z    -x_4 x_3  0    -x_4 0    0   -x_5 0   |

f_3 = | 0    0    -x_4 0    -x_6 0    0    0    0    |
      | -x_5 0    0    0    0    -x_6 0    0    0    |
      | 0    -z   0    0    0    0    -x_6 0    0    |
      | 0    0    -x_5 0    0    0    0    -x_6 0    |
      | -z   0    0    0    0    0    0    0    -x_6 |
      | 0    -x_2 x_4  0    0    0    0    0    0    |
      | x_2  0    -x_3 0    0    0    0    0    0    |
      | -x_4 x_3  0    0    0    0    0    0    0    |
      | -z   0    0    -x_3 0    -z   0    0    0    |
      | 0    -z   0    -x_4 0    0    -x_5 0    0    |
      | 0    0    -z   -x_2 0    0    0    -z   0    |
      | 0    0    0    0    0    z    0    0    -x_5 |
      | 0    0    0    0    -z   0    x_2  0    0    |
      | 0    0    0    0    0    -x_2 0    x_3  0    |
      | 0    0    0    0    0    0    -x_3 0    x_4  |
      | 0    0    0    0    x_5  0    0    -x_4 0    |

f_4 = | -x_6x_3   |
      | -x_6x_4   |
      | -x_6x_2   |
      | x_6z-zx_5 |
      | x_2x_4    |
      | x_3x_5    |
      | zx_4      |
      | x_2x_5    |
      | zx_3      |


------------------------------------------------------------------------------------------------------------------------


++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

delta(4,{x_1, x_2, x_3, x_4, x_5, x_6, x_7})   +   delta(2,{z, x_2, x_3, x_4, x_5, x_6})   ->   delta(4,{x_1, x_2, x_3, x_4, x_5, x_6, x_7, x_8})

------------------------------------------------------------------------------------------------------------------------

res(I): 

a_1 = | x_2x_4x_6 x_3x_5x_7 x_1x_4x_6 x_2x_5x_7 x_1x_3x_6 x_2x_4x_7 x_1x_3x_5 |

a_2 = {3} | 0    x_1  0    0    0    0    -x_7 |
      {3} | -x_1 0    x_2  0    0    0    0    |
      {3} | 0    -x_2 0    x_3  0    0    0    |
      {3} | 0    0    -x_3 0    x_4  0    0    |
      {3} | 0    0    0    -x_4 0    x_5  0    |
      {3} | 0    0    0    0    -x_5 0    x_6  |
      {3} | x_7  0    0    0    0    -x_6 0    |

a_3 = {4} | x_2x_4x_6 |
      {4} | x_3x_5x_7 |
      {4} | x_1x_4x_6 |
      {4} | x_2x_5x_7 |
      {4} | x_1x_3x_6 |
      {4} | x_2x_4x_7 |
      {4} | x_1x_3x_5 |


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res(J): 

b_1 = | x_2x_4 x_3x_5 zx_4 x_2x_5 zx_3 -zx_5 x_3x_6 x_4x_6 x_2x_6 |

b_2 = {2} | 0   z    0    0    -x_5 0    0    0    0    0    0    x_6  0    0   0    0   |
      {2} | -z  0    x_2  0    0    -z   0    0    0    0    0    0    x_6  0   0    0   |
      {2} | 0   -x_2 0    x_3  0    0    -x_5 0    0    0    0    0    0    x_6 0    0   |
      {2} | 0   0    -x_3 0    x_4  0    0    -z   0    0    0    0    0    0   x_6  0   |
      {2} | x_5 0    0    -x_4 0    0    0    0    0    0    0    0    0    0   0    x_6 |
      {2} | 0   0    0    0    0    -x_3 -x_4 -x_2 0    0    0    0    0    0   0    0   |
      {2} | 0   0    0    0    0    0    0    0    0    -x_2 x_4  0    -x_5 0   0    -z  |
      {2} | 0   0    0    0    0    0    0    0    x_2  0    -x_3 0    0    -z  0    0   |
      {2} | 0   0    0    0    0    0    0    0    -x_4 x_3  0    -x_4 0    0   -x_5 0   |

b_3 = {3} | 0    0    -x_4 0    -x_6 0    0    0    0    |
      {3} | -x_5 0    0    0    0    -x_6 0    0    0    |
      {3} | 0    -z   0    0    0    0    -x_6 0    0    |
      {3} | 0    0    -x_5 0    0    0    0    -x_6 0    |
      {3} | -z   0    0    0    0    0    0    0    -x_6 |
      {3} | 0    -x_2 x_4  0    0    0    0    0    0    |
      {3} | x_2  0    -x_3 0    0    0    0    0    0    |
      {3} | -x_4 x_3  0    0    0    0    0    0    0    |
      {3} | 0    0    0    -x_3 0    -z   0    0    0    |
      {3} | 0    0    0    -x_4 0    0    -x_5 0    0    |
      {3} | 0    0    0    -x_2 0    0    0    -z   0    |
      {3} | 0    0    0    0    0    z    0    0    -x_5 |
      {3} | 0    0    0    0    -z   0    x_2  0    0    |
      {3} | 0    0    0    0    0    -x_2 0    x_3  0    |
      {3} | 0    0    0    0    0    0    -x_3 0    x_4  |
      {3} | 0    0    0    0    x_5  0    0    -x_4 0    |

b_4 = {4} | -x_3x_6 |
      {4} | -x_4x_6 |
      {4} | -x_2x_6 |
      {4} | -zx_5   |
      {4} | x_2x_4  |
      {4} | x_3x_5  |
      {4} | zx_4    |
      {4} | x_2x_5  |
      {4} | zx_3    |

------------------------------------------------------------------------------------------------------------------------

phi: {x_2*x_4, x_3*x_5, z*x_4, x_2*x_5, z*x_3, -z*x_5, x_3*x_6, x_4*x_6, x_2*x_6} -> {0, 0, x_1*x_4*x_7, 0, x_1*x_3*x_7, -x_1*x_5*x_7, 0, 0, 0}

------------------------------------------------------------------------------------------------------------------------


alpha_1 = {2} | x_6 0   0   0   0   x_7 0   |
          {2} | 0   x_7 0   0   0   0   x_1 |
          {2} | 0   0   0   0   0   0   0   |
          {2} | 0   0   0   x_7 0   0   0   |
          {2} | 0   0   0   0   0   0   0   |
          {2} | 0   0   0   0   0   0   0   |
          {2} | 0   0   0   0   x_1 0   0   |
          {2} | 0   0   x_1 0   0   0   0   |
          {2} | 0   0   0   0   0   0   0   |

alpha_2 = {3} | 0 0    0   0    0   0    0 |
          {3} | 0 0    0   0    0   0    0 |
          {3} | 0 0    x_7 0    0   0    0 |
          {3} | 0 0    0   0    0   0    0 |
          {3} | 0 0    0   0    x_7 0    0 |
          {3} | 0 0    0   0    0   0    0 |
          {3} | 0 0    0   0    0   0    0 |
          {3} | 0 0    0   0    0   0    0 |
          {3} | 0 -x_1 0   0    0   0    0 |
          {3} | 0 0    0   0    0   0    0 |
          {3} | 0 0    0   -x_1 0   0    0 |
          {3} | 0 x_1  0   0    0   0    0 |
          {3} | 0 0    0   0    0   -x_1 0 |
          {3} | 0 0    0   0    0   0    0 |
          {3} | 0 0    0   0    0   0    0 |
          {3} | 0 0    0   0    0   0    0 |

alpha_3 = {4} | 0          |
          {4} | 0          |
          {4} | 0          |
          {4} | x_1x_5x_7  |
          {4} | 0          |
          {4} | 0          |
          {4} | -x_1x_4x_7 |
          {4} | 0          |
          {4} | -x_1x_3x_7 |


------------------------------------------------------------------------------------------------------------------------

beta_1 = | 0 0 -x_1x_4x_7 0 -x_1x_3x_7 x_1x_5x_7 0 0 0 |

beta_2 = {3} | 0    0   0 0 0 0    0 0    0 0 0 0 0 0    0 0    |
         {3} | -x_1 0   0 0 0 -x_1 0 0    0 0 0 0 0 0    0 0    |
         {3} | 0    0   0 0 0 0    0 0    0 0 0 0 0 -x_7 0 0    |
         {3} | 0    0   0 0 0 0    0 -x_1 0 0 0 0 0 0    0 0    |
         {3} | 0    0   0 0 0 0    0 0    0 0 0 0 0 0    0 -x_7 |
         {3} | 0    x_1 0 0 0 0    0 0    0 0 0 0 0 0    0 0    |
         {3} | 0    0   0 0 0 0    0 0    0 0 0 0 0 0    0 0    |

beta_3 = {4} | 0   0   0 0 -x_6 0    0 0    0 |
         {4} | 0   0   0 0 0    -x_7 0 0    0 |
         {4} | 0   x_1 0 0 0    0    0 0    0 |
         {4} | 0   0   0 0 0    0    0 -x_7 0 |
         {4} | x_1 0   0 0 0    0    0 0    0 |
         {4} | 0   0   0 0 -x_7 0    0 0    0 |
         {4} | 0   0   0 0 0    -x_1 0 0    0 |


------------------------------------------------------------------------------------------------------------------------

u = -1

------------------------------------------------------------------------------------------------------------------------

h_1 = 0

h_2 = 0

h_3 = 0


------------------------------------------------------------------------------------------------------------------------

f_1 = | x_2x_4x_6 x_3x_5x_7 x_1x_4x_6 x_2x_5x_7 x_1x_3x_6 x_2x_4x_7 x_1x_3x_5 x_8x_2x_4 x_8x_3x_5 x_8zx_4-x_1x_4x_7 x_8x_2x_5 x_8zx_3-x_1x_3x_7 -x_8zx_5+x_1x_5x_7 x_8x_3x_6 x_8x_4x_6 x_8x_2x_6 |

f_2 = | 0    x_1  0    0    0    0    -x_7 0    0   0    0    0    0    0   0    0    0    0    0    0    0    0    0    x_8  0    0    0    0    0    0    |
      | -x_1 0    x_2  0    0    0    0    -x_1 0   0    0    0    -x_1 0   0    0    0    0    0    0    0    0    0    0    x_8  0    0    0    0    0    |
      | 0    -x_2 0    x_3  0    0    0    0    0   0    0    0    0    0   0    0    0    0    0    0    -x_7 0    0    0    0    x_8  0    0    0    0    |
      | 0    0    -x_3 0    x_4  0    0    0    0   0    0    0    0    0   -x_1 0    0    0    0    0    0    0    0    0    0    0    x_8  0    0    0    |
      | 0    0    0    -x_4 0    x_5  0    0    0   0    0    0    0    0   0    0    0    0    0    0    0    0    -x_7 0    0    0    0    x_8  0    0    |
      | 0    0    0    0    -x_5 0    x_6  0    x_1 0    0    0    0    0   0    0    0    0    0    0    0    0    0    0    0    0    0    0    x_8  0    |
      | x_7  0    0    0    0    -x_6 0    0    0   0    0    0    0    0   0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    x_8  |
      | 0    0    0    0    0    0    0    0    -z  0    0    x_5  0    0   0    0    0    0    -x_6 0    0    0    0    -x_6 0    0    0    0    -x_7 0    |
      | 0    0    0    0    0    0    0    z    0   -x_2 0    0    z    0   0    0    0    0    0    -x_6 0    0    0    0    -x_7 0    0    0    0    -x_1 |
      | 0    0    0    0    0    0    0    0    x_2 0    -x_3 0    0    x_5 0    0    0    0    0    0    -x_6 0    0    0    0    0    0    0    0    0    |
      | 0    0    0    0    0    0    0    0    0   x_3  0    -x_4 0    0   z    0    0    0    0    0    0    -x_6 0    0    0    0    -x_7 0    0    0    |
      | 0    0    0    0    0    0    0    -x_5 0   0    x_4  0    0    0   0    0    0    0    0    0    0    0    -x_6 0    0    0    0    0    0    0    |
      | 0    0    0    0    0    0    0    0    0   0    0    0    x_3  x_4 x_2  0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    |
      | 0    0    0    0    0    0    0    0    0   0    0    0    0    0   0    0    x_2  -x_4 0    x_5  0    0    z    0    0    0    0    -x_1 0    0    |
      | 0    0    0    0    0    0    0    0    0   0    0    0    0    0   0    -x_2 0    x_3  0    0    z    0    0    0    0    -x_1 0    0    0    0    |
      | 0    0    0    0    0    0    0    0    0   0    0    0    0    0   0    x_4  -x_3 0    x_4  0    0    x_5  0    0    0    0    0    0    0    0    |

f_3 = | 0    0    0    0   -x_6 0    0    0    0    -x_8 0    0    0    0    0    0    |
      | 0    0    0    0   0    -x_7 0    0    0    0    -x_8 0    0    0    0    0    |
      | 0    x_1  0    0   0    0    0    0    0    0    0    -x_8 0    0    0    0    |
      | 0    0    0    0   0    0    0    -x_7 0    0    0    0    -x_8 0    0    0    |
      | x_1  0    0    0   0    0    0    0    0    0    0    0    0    -x_8 0    0    |
      | 0    0    0    0   -x_7 0    0    0    0    0    0    0    0    0    -x_8 0    |
      | 0    0    0    0   0    -x_1 0    0    0    0    0    0    0    0    0    -x_8 |
      | 0    0    x_4  0   x_6  0    0    0    0    0    0    0    0    0    0    0    |
      | x_5  0    0    0   0    x_6  0    0    0    0    0    0    0    0    0    0    |
      | 0    z    0    0   0    0    x_6  0    0    0    0    -x_7 0    0    0    0    |
      | 0    0    x_5  0   0    0    0    x_6  0    0    0    0    0    0    0    0    |
      | z    0    0    0   0    0    0    0    x_6  0    0    0    0    -x_7 0    0    |
      | 0    x_2  -x_4 0   0    0    0    0    0    0    0    0    0    0    0    0    |
      | -x_2 0    x_3  0   0    0    0    0    0    0    0    0    0    0    0    0    |
      | x_4  -x_3 0    0   0    0    0    0    0    0    0    0    0    0    0    0    |
      | 0    0    0    x_3 0    z    0    0    0    0    x_1  0    0    0    0    0    |
      | 0    0    0    x_4 0    0    x_5  0    0    0    0    0    0    0    0    0    |
      | 0    0    0    x_2 0    0    0    z    0    0    0    0    x_1  0    0    0    |
      | 0    0    0    0   0    -z   0    0    x_5  0    -x_1 0    0    0    0    0    |
      | 0    0    0    0   z    0    -x_2 0    0    0    0    0    0    0    x_1  0    |
      | 0    0    0    0   0    x_2  0    -x_3 0    0    0    0    0    0    0    0    |
      | 0    0    0    0   0    0    x_3  0    -x_4 0    0    0    0    0    0    0    |
      | 0    0    0    0   -x_5 0    0    x_4  0    0    0    0    0    0    0    0    |
      | 0    0    0    0   0    0    0    0    0    0    x_1  0    0    0    0    -x_7 |
      | 0    0    0    0   0    0    0    0    0    -x_1 0    x_2  0    0    0    0    |
      | 0    0    0    0   0    0    0    0    0    0    -x_2 0    x_3  0    0    0    |
      | 0    0    0    0   0    0    0    0    0    0    0    -x_3 0    x_4  0    0    |
      | 0    0    0    0   0    0    0    0    0    0    0    0    -x_4 0    x_5  0    |
      | 0    0    0    0   0    0    0    0    0    0    0    0    0    -x_5 0    x_6  |
      | 0    0    0    0   0    0    0    0    0    x_7  0    0    0    0    -x_6 0    |

f_4 = | x_8x_3x_6          |
      | x_8x_4x_6          |
      | x_8x_2x_6          |
      | x_8zx_5-x_1x_5x_7  |
      | -x_8x_2x_4         |
      | -x_8x_3x_5         |
      | -x_8zx_4+x_1x_4x_7 |
      | -x_8x_2x_5         |
      | -x_8zx_3+x_1x_3x_7 |
      | x_2x_4x_6          |
      | x_3x_5x_7          |
      | x_1x_4x_6          |
      | x_2x_5x_7          |
      | x_1x_3x_6          |
      | x_2x_4x_7          |
      | x_1x_3x_5          |


------------------------------------------------------------------------------------------------------------------------

Δ(6,10):

(this of course also contains in particular the above calculation)

i5 : R=QQ[x_1..x_10];
i6 : cc=cycRes(6,R,verbose=>2);

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

delta(2,{z, x_2, x_3, x_4, x_5})   +   delta(0,{z, x_2, x_3, x_4})   ->   delta(2,{z, x_2, x_3, x_4, x_5, x_6})

------------------------------------------------------------------------------------------------------------------------

res(I): 

a_1 = | x_2x_4 x_3x_5 zx_4 x_2x_5 zx_3 |

a_2 = {2} | 0   z    0    0    -x_5 |
      {2} | -z  0    x_2  0    0    |
      {2} | 0   -x_2 0    x_3  0    |
      {2} | 0   0    -x_3 0    x_4  |
      {2} | x_5 0    0    -x_4 0    |

a_3 = {3} | x_2x_4 |
      {3} | x_3x_5 |
      {3} | zx_4   |
      {3} | x_2x_5 |
      {3} | zx_3   |


------------------------------------------------------------------------------------------------------------------------

res(J): 

b_1 = | z x_3 x_4 x_2 |

b_2 = {1} | x_3 x_4 x_2 0    0    0    |
      {1} | -z  0   0   0    x_2  -x_4 |
      {1} | 0   -z  0   -x_2 0    x_3  |
      {1} | 0   0   -z  x_4  -x_3 0    |

b_3 = {2} | 0    x_2  -x_4 0   |
      {2} | -x_2 0    x_3  0   |
      {2} | x_4  -x_3 0    0   |
      {2} | z    0    0    x_3 |
      {2} | 0    z    0    x_4 |
      {2} | 0    0    z    x_2 |

b_4 = {3} | x_3 |
      {3} | x_4 |
      {3} | x_2 |
      {3} | -z  |

------------------------------------------------------------------------------------------------------------------------

phi: {z, x_3, x_4, x_2} -> {z*x_5, 0, 0, 0}

------------------------------------------------------------------------------------------------------------------------


alpha_1 = {1} | 0   0   0 0   0 |
          {1} | 0   x_5 0 0   z |
          {1} | 0   0   z 0   0 |
          {1} | x_4 0   0 x_5 0 |

alpha_2 = {2} | 0 0 0   0 0 |
          {2} | 0 0 0   0 0 |
          {2} | 0 0 0   0 0 |
          {2} | 0 z 0   0 0 |
          {2} | 0 0 x_5 0 0 |
          {2} | 0 0 0   z 0 |

alpha_3 = {3} | 0    |
          {3} | 0    |
          {3} | 0    |
          {3} | zx_5 |


------------------------------------------------------------------------------------------------------------------------

beta_1 = | -zx_5 0 0 0 |

beta_2 = {2} | 0  0    0  0 0 0 |
         {2} | -z 0    0  0 0 0 |
         {2} | 0  -x_5 0  0 0 0 |
         {2} | 0  0    -z 0 0 0 |
         {2} | 0  0    0  0 0 0 |

beta_3 = {3} | 0    0  -x_4 0 |
         {3} | -x_5 0  0    0 |
         {3} | 0    -z 0    0 |
         {3} | 0    0  -x_5 0 |
         {3} | -z   0  0    0 |


------------------------------------------------------------------------------------------------------------------------

u = -1

------------------------------------------------------------------------------------------------------------------------

h_1 = 0

h_2 = 0

h_3 = 0


------------------------------------------------------------------------------------------------------------------------

f_1 = | x_2x_4 x_3x_5 zx_4 x_2x_5 zx_3 x_6z-zx_5 x_6x_3 x_6x_4 x_6x_2 |

f_2 = | 0   z    0    0    -x_5 0    0    0    0    0    0    x_6  0    0   0    0   |
      | -z  0    x_2  0    0    -z   0    0    0    0    0    0    x_6  0   0    0   |
      | 0   -x_2 0    x_3  0    0    -x_5 0    0    0    0    0    0    x_6 0    0   |
      | 0   0    -x_3 0    x_4  0    0    -z   0    0    0    0    0    0   x_6  0   |
      | x_5 0    0    -x_4 0    0    0    0    0    0    0    0    0    0   0    x_6 |
      | 0   0    0    0    0    -x_3 -x_4 -x_2 0    0    0    0    0    0   0    0   |
      | 0   0    0    0    0    z    0    0    0    -x_2 x_4  0    -x_5 0   0    -z  |
      | 0   0    0    0    0    0    z    0    x_2  0    -x_3 0    0    -z  0    0   |
      | 0   0    0    0    0    0    0    z    -x_4 x_3  0    -x_4 0    0   -x_5 0   |

f_3 = | 0    0    -x_4 0    -x_6 0    0    0    0    |
      | -x_5 0    0    0    0    -x_6 0    0    0    |
      | 0    -z   0    0    0    0    -x_6 0    0    |
      | 0    0    -x_5 0    0    0    0    -x_6 0    |
      | -z   0    0    0    0    0    0    0    -x_6 |
      | 0    -x_2 x_4  0    0    0    0    0    0    |
      | x_2  0    -x_3 0    0    0    0    0    0    |
      | -x_4 x_3  0    0    0    0    0    0    0    |
      | -z   0    0    -x_3 0    -z   0    0    0    |
      | 0    -z   0    -x_4 0    0    -x_5 0    0    |
      | 0    0    -z   -x_2 0    0    0    -z   0    |
      | 0    0    0    0    0    z    0    0    -x_5 |
      | 0    0    0    0    -z   0    x_2  0    0    |
      | 0    0    0    0    0    -x_2 0    x_3  0    |
      | 0    0    0    0    0    0    -x_3 0    x_4  |
      | 0    0    0    0    x_5  0    0    -x_4 0    |

f_4 = | -x_6x_3   |
      | -x_6x_4   |
      | -x_6x_2   |
      | x_6z-zx_5 |
      | x_2x_4    |
      | x_3x_5    |
      | zx_4      |
      | x_2x_5    |
      | zx_3      |


------------------------------------------------------------------------------------------------------------------------


++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

delta(4,{z, x_2, x_3, x_4, x_5, x_6, x_7})   +   delta(2,{z, x_2, x_3, x_4, x_5, x_6})   ->   delta(4,{z, x_2, x_3, x_4, x_5, x_6, x_7, x_8})

------------------------------------------------------------------------------------------------------------------------

res(I): 

a_1 = | x_2x_4x_6 x_3x_5x_7 zx_4x_6 x_2x_5x_7 zx_3x_6 x_2x_4x_7 zx_3x_5 |

a_2 = {3} | 0   z    0    0    0    0    -x_7 |
      {3} | -z  0    x_2  0    0    0    0    |
      {3} | 0   -x_2 0    x_3  0    0    0    |
      {3} | 0   0    -x_3 0    x_4  0    0    |
      {3} | 0   0    0    -x_4 0    x_5  0    |
      {3} | 0   0    0    0    -x_5 0    x_6  |
      {3} | x_7 0    0    0    0    -x_6 0    |

a_3 = {4} | x_2x_4x_6 |
      {4} | x_3x_5x_7 |
      {4} | zx_4x_6   |
      {4} | x_2x_5x_7 |
      {4} | zx_3x_6   |
      {4} | x_2x_4x_7 |
      {4} | zx_3x_5   |


------------------------------------------------------------------------------------------------------------------------

res(J): 

b_1 = | x_2x_4 x_3x_5 zx_4 x_2x_5 zx_3 -zx_5 x_3x_6 x_4x_6 x_2x_6 |

b_2 = {2} | 0   z    0    0    -x_5 0    0    0    0    0    0    x_6  0    0   0    0   |
      {2} | -z  0    x_2  0    0    -z   0    0    0    0    0    0    x_6  0   0    0   |
      {2} | 0   -x_2 0    x_3  0    0    -x_5 0    0    0    0    0    0    x_6 0    0   |
      {2} | 0   0    -x_3 0    x_4  0    0    -z   0    0    0    0    0    0   x_6  0   |
      {2} | x_5 0    0    -x_4 0    0    0    0    0    0    0    0    0    0   0    x_6 |
      {2} | 0   0    0    0    0    -x_3 -x_4 -x_2 0    0    0    0    0    0   0    0   |
      {2} | 0   0    0    0    0    0    0    0    0    -x_2 x_4  0    -x_5 0   0    -z  |
      {2} | 0   0    0    0    0    0    0    0    x_2  0    -x_3 0    0    -z  0    0   |
      {2} | 0   0    0    0    0    0    0    0    -x_4 x_3  0    -x_4 0    0   -x_5 0   |

b_3 = {3} | 0    0    -x_4 0    -x_6 0    0    0    0    |
      {3} | -x_5 0    0    0    0    -x_6 0    0    0    |
      {3} | 0    -z   0    0    0    0    -x_6 0    0    |
      {3} | 0    0    -x_5 0    0    0    0    -x_6 0    |
      {3} | -z   0    0    0    0    0    0    0    -x_6 |
      {3} | 0    -x_2 x_4  0    0    0    0    0    0    |
      {3} | x_2  0    -x_3 0    0    0    0    0    0    |
      {3} | -x_4 x_3  0    0    0    0    0    0    0    |
      {3} | 0    0    0    -x_3 0    -z   0    0    0    |
      {3} | 0    0    0    -x_4 0    0    -x_5 0    0    |
      {3} | 0    0    0    -x_2 0    0    0    -z   0    |
      {3} | 0    0    0    0    0    z    0    0    -x_5 |
      {3} | 0    0    0    0    -z   0    x_2  0    0    |
      {3} | 0    0    0    0    0    -x_2 0    x_3  0    |
      {3} | 0    0    0    0    0    0    -x_3 0    x_4  |
      {3} | 0    0    0    0    x_5  0    0    -x_4 0    |

b_4 = {4} | -x_3x_6 |
      {4} | -x_4x_6 |
      {4} | -x_2x_6 |
      {4} | -zx_5   |
      {4} | x_2x_4  |
      {4} | x_3x_5  |
      {4} | zx_4    |
      {4} | x_2x_5  |
      {4} | zx_3    |

------------------------------------------------------------------------------------------------------------------------

phi: {x_2*x_4, x_3*x_5, z*x_4, x_2*x_5, z*x_3, -z*x_5, x_3*x_6, x_4*x_6, x_2*x_6} -> {0, 0, z*x_4*x_7, 0, z*x_3*x_7, -z*x_5*x_7, 0, 0, 0}

------------------------------------------------------------------------------------------------------------------------


alpha_1 = {2} | x_6 0   0 0   0 x_7 0 |
          {2} | 0   x_7 0 0   0 0   z |
          {2} | 0   0   0 0   0 0   0 |
          {2} | 0   0   0 x_7 0 0   0 |
          {2} | 0   0   0 0   0 0   0 |
          {2} | 0   0   0 0   0 0   0 |
          {2} | 0   0   0 0   z 0   0 |
          {2} | 0   0   z 0   0 0   0 |
          {2} | 0   0   0 0   0 0   0 |

alpha_2 = {3} | 0 0  0   0  0   0  0 |
          {3} | 0 0  0   0  0   0  0 |
          {3} | 0 0  x_7 0  0   0  0 |
          {3} | 0 0  0   0  0   0  0 |
          {3} | 0 0  0   0  x_7 0  0 |
          {3} | 0 0  0   0  0   0  0 |
          {3} | 0 0  0   0  0   0  0 |
          {3} | 0 0  0   0  0   0  0 |
          {3} | 0 -z 0   0  0   0  0 |
          {3} | 0 0  0   0  0   0  0 |
          {3} | 0 0  0   -z 0   0  0 |
          {3} | 0 z  0   0  0   0  0 |
          {3} | 0 0  0   0  0   -z 0 |
          {3} | 0 0  0   0  0   0  0 |
          {3} | 0 0  0   0  0   0  0 |
          {3} | 0 0  0   0  0   0  0 |

alpha_3 = {4} | 0        |
          {4} | 0        |
          {4} | 0        |
          {4} | zx_5x_7  |
          {4} | 0        |
          {4} | 0        |
          {4} | -zx_4x_7 |
          {4} | 0        |
          {4} | -zx_3x_7 |


------------------------------------------------------------------------------------------------------------------------

beta_1 = | 0 0 -zx_4x_7 0 -zx_3x_7 zx_5x_7 0 0 0 |

beta_2 = {3} | 0  0 0 0 0 0  0 0  0 0 0 0 0 0    0 0    |
         {3} | -z 0 0 0 0 -z 0 0  0 0 0 0 0 0    0 0    |
         {3} | 0  0 0 0 0 0  0 0  0 0 0 0 0 -x_7 0 0    |
         {3} | 0  0 0 0 0 0  0 -z 0 0 0 0 0 0    0 0    |
         {3} | 0  0 0 0 0 0  0 0  0 0 0 0 0 0    0 -x_7 |
         {3} | 0  z 0 0 0 0  0 0  0 0 0 0 0 0    0 0    |
         {3} | 0  0 0 0 0 0  0 0  0 0 0 0 0 0    0 0    |

beta_3 = {4} | 0 0 0 0 -x_6 0    0 0    0 |
         {4} | 0 0 0 0 0    -x_7 0 0    0 |
         {4} | 0 z 0 0 0    0    0 0    0 |
         {4} | 0 0 0 0 0    0    0 -x_7 0 |
         {4} | z 0 0 0 0    0    0 0    0 |
         {4} | 0 0 0 0 -x_7 0    0 0    0 |
         {4} | 0 0 0 0 0    -z   0 0    0 |


------------------------------------------------------------------------------------------------------------------------

u = -1

------------------------------------------------------------------------------------------------------------------------

h_1 = 0

h_2 = 0

h_3 = 0


------------------------------------------------------------------------------------------------------------------------

f_1 = | x_2x_4x_6 x_3x_5x_7 zx_4x_6 x_2x_5x_7 zx_3x_6 x_2x_4x_7 zx_3x_5 x_8x_2x_4 x_8x_3x_5 x_8zx_4-zx_4x_7 x_8x_2x_5 x_8zx_3-zx_3x_7 -x_8zx_5+zx_5x_7 x_8x_3x_6 x_8x_4x_6 x_8x_2x_6 |

f_2 = | 0   z    0    0    0    0    -x_7 0    0   0    0    0    0   0   0   0    0    0    0    0    0    0    0    x_8  0    0   0    0   0    0   |
      | -z  0    x_2  0    0    0    0    -z   0   0    0    0    -z  0   0   0    0    0    0    0    0    0    0    0    x_8  0   0    0   0    0   |
      | 0   -x_2 0    x_3  0    0    0    0    0   0    0    0    0   0   0   0    0    0    0    0    -x_7 0    0    0    0    x_8 0    0   0    0   |
      | 0   0    -x_3 0    x_4  0    0    0    0   0    0    0    0   0   -z  0    0    0    0    0    0    0    0    0    0    0   x_8  0   0    0   |
      | 0   0    0    -x_4 0    x_5  0    0    0   0    0    0    0   0   0   0    0    0    0    0    0    0    -x_7 0    0    0   0    x_8 0    0   |
      | 0   0    0    0    -x_5 0    x_6  0    z   0    0    0    0   0   0   0    0    0    0    0    0    0    0    0    0    0   0    0   x_8  0   |
      | x_7 0    0    0    0    -x_6 0    0    0   0    0    0    0   0   0   0    0    0    0    0    0    0    0    0    0    0   0    0   0    x_8 |
      | 0   0    0    0    0    0    0    0    -z  0    0    x_5  0   0   0   0    0    0    -x_6 0    0    0    0    -x_6 0    0   0    0   -x_7 0   |
      | 0   0    0    0    0    0    0    z    0   -x_2 0    0    z   0   0   0    0    0    0    -x_6 0    0    0    0    -x_7 0   0    0   0    -z  |
      | 0   0    0    0    0    0    0    0    x_2 0    -x_3 0    0   x_5 0   0    0    0    0    0    -x_6 0    0    0    0    0   0    0   0    0   |
      | 0   0    0    0    0    0    0    0    0   x_3  0    -x_4 0   0   z   0    0    0    0    0    0    -x_6 0    0    0    0   -x_7 0   0    0   |
      | 0   0    0    0    0    0    0    -x_5 0   0    x_4  0    0   0   0   0    0    0    0    0    0    0    -x_6 0    0    0   0    0   0    0   |
      | 0   0    0    0    0    0    0    0    0   0    0    0    x_3 x_4 x_2 0    0    0    0    0    0    0    0    0    0    0   0    0   0    0   |
      | 0   0    0    0    0    0    0    0    0   0    0    0    0   0   0   0    x_2  -x_4 0    x_5  0    0    z    0    0    0   0    -z  0    0   |
      | 0   0    0    0    0    0    0    0    0   0    0    0    0   0   0   -x_2 0    x_3  0    0    z    0    0    0    0    -z  0    0   0    0   |
      | 0   0    0    0    0    0    0    0    0   0    0    0    0   0   0   x_4  -x_3 0    x_4  0    0    x_5  0    0    0    0   0    0   0    0   |

f_3 = | 0    0    0    0   -x_6 0    0    0    0    -x_8 0    0    0    0    0    0    |
      | 0    0    0    0   0    -x_7 0    0    0    0    -x_8 0    0    0    0    0    |
      | 0    z    0    0   0    0    0    0    0    0    0    -x_8 0    0    0    0    |
      | 0    0    0    0   0    0    0    -x_7 0    0    0    0    -x_8 0    0    0    |
      | z    0    0    0   0    0    0    0    0    0    0    0    0    -x_8 0    0    |
      | 0    0    0    0   -x_7 0    0    0    0    0    0    0    0    0    -x_8 0    |
      | 0    0    0    0   0    -z   0    0    0    0    0    0    0    0    0    -x_8 |
      | 0    0    x_4  0   x_6  0    0    0    0    0    0    0    0    0    0    0    |
      | x_5  0    0    0   0    x_6  0    0    0    0    0    0    0    0    0    0    |
      | 0    z    0    0   0    0    x_6  0    0    0    0    -x_7 0    0    0    0    |
      | 0    0    x_5  0   0    0    0    x_6  0    0    0    0    0    0    0    0    |
      | z    0    0    0   0    0    0    0    x_6  0    0    0    0    -x_7 0    0    |
      | 0    x_2  -x_4 0   0    0    0    0    0    0    0    0    0    0    0    0    |
      | -x_2 0    x_3  0   0    0    0    0    0    0    0    0    0    0    0    0    |
      | x_4  -x_3 0    0   0    0    0    0    0    0    0    0    0    0    0    0    |
      | 0    0    0    x_3 0    z    0    0    0    0    z    0    0    0    0    0    |
      | 0    0    0    x_4 0    0    x_5  0    0    0    0    0    0    0    0    0    |
      | 0    0    0    x_2 0    0    0    z    0    0    0    0    z    0    0    0    |
      | 0    0    0    0   0    -z   0    0    x_5  0    -z   0    0    0    0    0    |
      | 0    0    0    0   z    0    -x_2 0    0    0    0    0    0    0    z    0    |
      | 0    0    0    0   0    x_2  0    -x_3 0    0    0    0    0    0    0    0    |
      | 0    0    0    0   0    0    x_3  0    -x_4 0    0    0    0    0    0    0    |
      | 0    0    0    0   -x_5 0    0    x_4  0    0    0    0    0    0    0    0    |
      | 0    0    0    0   0    0    0    0    0    0    z    0    0    0    0    -x_7 |
      | 0    0    0    0   0    0    0    0    0    -z   0    x_2  0    0    0    0    |
      | 0    0    0    0   0    0    0    0    0    0    -x_2 0    x_3  0    0    0    |
      | 0    0    0    0   0    0    0    0    0    0    0    -x_3 0    x_4  0    0    |
      | 0    0    0    0   0    0    0    0    0    0    0    0    -x_4 0    x_5  0    |
      | 0    0    0    0   0    0    0    0    0    0    0    0    0    -x_5 0    x_6  |
      | 0    0    0    0   0    0    0    0    0    x_7  0    0    0    0    -x_6 0    |

f_4 = | x_8x_3x_6        |
      | x_8x_4x_6        |
      | x_8x_2x_6        |
      | x_8zx_5-zx_5x_7  |
      | -x_8x_2x_4       |
      | -x_8x_3x_5       |
      | -x_8zx_4+zx_4x_7 |
      | -x_8x_2x_5       |
      | -x_8zx_3+zx_3x_7 |
      | x_2x_4x_6        |
      | x_3x_5x_7        |
      | zx_4x_6          |
      | x_2x_5x_7        |
      | zx_3x_6          |
      | x_2x_4x_7        |
      | zx_3x_5          |


------------------------------------------------------------------------------------------------------------------------


++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

delta(6,{x_1, x_2, x_3, x_4, x_5, x_6, x_7, x_8, x_9})   +   delta(4,{z, x_2, x_3, x_4, x_5, x_6, x_7, x_8})   ->   delta(6,{x_1, x_2, x_3, x_4, x_5, x_6, x_7, x_8, x_9, x_10})

------------------------------------------------------------------------------------------------------------------------

res(I): 

a_1 = | x_2x_4x_6x_8 x_3x_5x_7x_9 x_1x_4x_6x_8 x_2x_5x_7x_9 x_1x_3x_6x_8 x_2x_4x_7x_9 x_1x_3x_5x_8 x_2x_4x_6x_9 x_1x_3x_5x_7 |

a_2 = {4} | 0    x_1  0    0    0    0    0    0    -x_9 |
      {4} | -x_1 0    x_2  0    0    0    0    0    0    |
      {4} | 0    -x_2 0    x_3  0    0    0    0    0    |
      {4} | 0    0    -x_3 0    x_4  0    0    0    0    |
      {4} | 0    0    0    -x_4 0    x_5  0    0    0    |
      {4} | 0    0    0    0    -x_5 0    x_6  0    0    |
      {4} | 0    0    0    0    0    -x_6 0    x_7  0    |
      {4} | 0    0    0    0    0    0    -x_7 0    x_8  |
      {4} | x_9  0    0    0    0    0    0    -x_8 0    |

a_3 = {5} | x_2x_4x_6x_8 |
      {5} | x_3x_5x_7x_9 |
      {5} | x_1x_4x_6x_8 |
      {5} | x_2x_5x_7x_9 |
      {5} | x_1x_3x_6x_8 |
      {5} | x_2x_4x_7x_9 |
      {5} | x_1x_3x_5x_8 |
      {5} | x_2x_4x_6x_9 |
      {5} | x_1x_3x_5x_7 |


------------------------------------------------------------------------------------------------------------------------

res(J): 

b_1 = | x_2x_4x_6 x_3x_5x_7 zx_4x_6 x_2x_5x_7 zx_3x_6 x_2x_4x_7 zx_3x_5 x_2x_4x_8 x_3x_5x_8 -zx_4x_7 x_2x_5x_8 -zx_3x_7 zx_5x_7 x_3x_6x_8 x_4x_6x_8 x_2x_6x_8 |

b_2 = {3} | 0   z    0    0    0    0    -x_7 0    0   0    0    0    0   0   0   0    0    0    0    0    0    0    0    x_8  0    0   0    0   0    0   |
      {3} | -z  0    x_2  0    0    0    0    -z   0   0    0    0    -z  0   0   0    0    0    0    0    0    0    0    0    x_8  0   0    0   0    0   |
      {3} | 0   -x_2 0    x_3  0    0    0    0    0   0    0    0    0   0   0   0    0    0    0    0    -x_7 0    0    0    0    x_8 0    0   0    0   |
      {3} | 0   0    -x_3 0    x_4  0    0    0    0   0    0    0    0   0   -z  0    0    0    0    0    0    0    0    0    0    0   x_8  0   0    0   |
      {3} | 0   0    0    -x_4 0    x_5  0    0    0   0    0    0    0   0   0   0    0    0    0    0    0    0    -x_7 0    0    0   0    x_8 0    0   |
      {3} | 0   0    0    0    -x_5 0    x_6  0    z   0    0    0    0   0   0   0    0    0    0    0    0    0    0    0    0    0   0    0   x_8  0   |
      {3} | x_7 0    0    0    0    -x_6 0    0    0   0    0    0    0   0   0   0    0    0    0    0    0    0    0    0    0    0   0    0   0    x_8 |
      {3} | 0   0    0    0    0    0    0    0    0   0    0    x_5  0   0   0   0    0    0    -x_6 0    0    0    0    -x_6 0    0   0    0   -x_7 0   |
      {3} | 0   0    0    0    0    0    0    0    0   -x_2 0    0    0   0   0   0    0    0    0    -x_6 0    0    0    0    -x_7 0   0    0   0    -z  |
      {3} | 0   0    0    0    0    0    0    0    x_2 0    -x_3 0    0   x_5 0   0    0    0    0    0    -x_6 0    0    0    0    0   0    0   0    0   |
      {3} | 0   0    0    0    0    0    0    0    0   x_3  0    -x_4 0   0   0   0    0    0    0    0    0    -x_6 0    0    0    0   -x_7 0   0    0   |
      {3} | 0   0    0    0    0    0    0    -x_5 0   0    x_4  0    0   0   0   0    0    0    0    0    0    0    -x_6 0    0    0   0    0   0    0   |
      {3} | 0   0    0    0    0    0    0    0    0   0    0    0    x_3 x_4 x_2 0    0    0    0    0    0    0    0    0    0    0   0    0   0    0   |
      {3} | 0   0    0    0    0    0    0    0    0   0    0    0    0   0   0   0    x_2  -x_4 0    x_5  0    0    0    0    0    0   0    -z  0    0   |
      {3} | 0   0    0    0    0    0    0    0    0   0    0    0    0   0   0   -x_2 0    x_3  0    0    0    0    0    0    0    -z  0    0   0    0   |
      {3} | 0   0    0    0    0    0    0    0    0   0    0    0    0   0   0   x_4  -x_3 0    x_4  0    0    x_5  0    0    0    0   0    0   0    0   |

b_3 = {4} | 0    0    0    0   -x_6 0    0    0    0    -x_8 0    0    0    0    0    0    |
      {4} | 0    0    0    0   0    -x_7 0    0    0    0    -x_8 0    0    0    0    0    |
      {4} | 0    z    0    0   0    0    0    0    0    0    0    -x_8 0    0    0    0    |
      {4} | 0    0    0    0   0    0    0    -x_7 0    0    0    0    -x_8 0    0    0    |
      {4} | z    0    0    0   0    0    0    0    0    0    0    0    0    -x_8 0    0    |
      {4} | 0    0    0    0   -x_7 0    0    0    0    0    0    0    0    0    -x_8 0    |
      {4} | 0    0    0    0   0    -z   0    0    0    0    0    0    0    0    0    -x_8 |
      {4} | 0    0    x_4  0   x_6  0    0    0    0    0    0    0    0    0    0    0    |
      {4} | x_5  0    0    0   0    x_6  0    0    0    0    0    0    0    0    0    0    |
      {4} | 0    0    0    0   0    0    x_6  0    0    0    0    -x_7 0    0    0    0    |
      {4} | 0    0    x_5  0   0    0    0    x_6  0    0    0    0    0    0    0    0    |
      {4} | 0    0    0    0   0    0    0    0    x_6  0    0    0    0    -x_7 0    0    |
      {4} | 0    x_2  -x_4 0   0    0    0    0    0    0    0    0    0    0    0    0    |
      {4} | -x_2 0    x_3  0   0    0    0    0    0    0    0    0    0    0    0    0    |
      {4} | x_4  -x_3 0    0   0    0    0    0    0    0    0    0    0    0    0    0    |
      {4} | 0    0    0    x_3 0    0    0    0    0    0    z    0    0    0    0    0    |
      {4} | 0    0    0    x_4 0    0    x_5  0    0    0    0    0    0    0    0    0    |
      {4} | 0    0    0    x_2 0    0    0    0    0    0    0    0    z    0    0    0    |
      {4} | 0    0    0    0   0    0    0    0    x_5  0    -z   0    0    0    0    0    |
      {4} | 0    0    0    0   0    0    -x_2 0    0    0    0    0    0    0    z    0    |
      {4} | 0    0    0    0   0    x_2  0    -x_3 0    0    0    0    0    0    0    0    |
      {4} | 0    0    0    0   0    0    x_3  0    -x_4 0    0    0    0    0    0    0    |
      {4} | 0    0    0    0   -x_5 0    0    x_4  0    0    0    0    0    0    0    0    |
      {4} | 0    0    0    0   0    0    0    0    0    0    z    0    0    0    0    -x_7 |
      {4} | 0    0    0    0   0    0    0    0    0    -z   0    x_2  0    0    0    0    |
      {4} | 0    0    0    0   0    0    0    0    0    0    -x_2 0    x_3  0    0    0    |
      {4} | 0    0    0    0   0    0    0    0    0    0    0    -x_3 0    x_4  0    0    |
      {4} | 0    0    0    0   0    0    0    0    0    0    0    0    -x_4 0    x_5  0    |
      {4} | 0    0    0    0   0    0    0    0    0    0    0    0    0    -x_5 0    x_6  |
      {4} | 0    0    0    0   0    0    0    0    0    x_7  0    0    0    0    -x_6 0    |

b_4 = {5} | x_3x_6x_8  |
      {5} | x_4x_6x_8  |
      {5} | x_2x_6x_8  |
      {5} | -zx_5x_7   |
      {5} | -x_2x_4x_8 |
      {5} | -x_3x_5x_8 |
      {5} | zx_4x_7    |
      {5} | -x_2x_5x_8 |
      {5} | zx_3x_7    |
      {5} | x_2x_4x_6  |
      {5} | x_3x_5x_7  |
      {5} | zx_4x_6    |
      {5} | x_2x_5x_7  |
      {5} | zx_3x_6    |
      {5} | x_2x_4x_7  |
      {5} | zx_3x_5    |

------------------------------------------------------------------------------------------------------------------------

phi: {x_2*x_4*x_6, x_3*x_5*x_7, z*x_4*x_6, x_2*x_5*x_7, z*x_3*x_6, x_2*x_4*x_7, z*x_3*x_5, x_2*x_4*x_8, x_3*x_5*x_8, -z*x_4*x_7, x_2*x_5*x_8, -z*x_3*x_7, z*x_5*x_7, x_3*x_6*x_8, x_4*x_6*x_8, x_2*x_6*x_8} -> {0, 0, x_1*x_4*x_6*x_9, 0, x_1*x_3*x_6*x_9, 0, x_1*x_3*x_5*x_9, 0, 0, -x_1*x_4*x_7*x_9, 0, -x_1*x_3*x_7*x_9, x_1*x_5*x_7*x_9, 0, 0, 0}

------------------------------------------------------------------------------------------------------------------------


alpha_1 = {3} | x_8 0   0   0   0   0   0   x_9 0   |
          {3} | 0   x_9 0   0   0   0   0   0   x_1 |
          {3} | 0   0   0   0   0   0   0   0   0   |
          {3} | 0   0   0   x_9 0   0   0   0   0   |
          {3} | 0   0   0   0   0   0   0   0   0   |
          {3} | 0   0   0   0   0   x_9 0   0   0   |
          {3} | 0   0   0   0   0   0   0   0   0   |
          {3} | 0   0   0   0   0   0   0   0   0   |
          {3} | 0   0   0   0   0   0   x_1 0   0   |
          {3} | 0   0   0   0   0   0   0   0   0   |
          {3} | 0   0   0   0   0   0   0   0   0   |
          {3} | 0   0   0   0   0   0   0   0   0   |
          {3} | 0   0   0   0   0   0   0   0   0   |
          {3} | 0   0   0   0   x_1 0   0   0   0   |
          {3} | 0   0   x_1 0   0   0   0   0   0   |
          {3} | 0   0   0   0   0   0   0   0   0   |

alpha_2 = {4} | 0 0    0   0   0   0   0   0    0 |
          {4} | 0 0    0   0   0   0   0   0    0 |
          {4} | 0 0    x_9 0   0   0   0   0    0 |
          {4} | 0 0    0   0   0   0   0   0    0 |
          {4} | 0 0    0   0   x_9 0   0   0    0 |
          {4} | 0 0    0   0   0   0   0   0    0 |
          {4} | 0 0    0   0   0   0   x_9 0    0 |
          {4} | 0 0    0   0   0   0   0   0    0 |
          {4} | 0 0    0   0   0   0   0   0    0 |
          {4} | 0 0    0   0   0   0   0   0    0 |
          {4} | 0 0    0   0   0   0   0   0    0 |
          {4} | 0 0    0   0   0   0   0   0    0 |
          {4} | 0 0    0   0   0   0   0   0    0 |
          {4} | 0 0    0   0   0   0   0   0    0 |
          {4} | 0 0    0   0   0   0   0   0    0 |
          {4} | 0 x_1  0   0   0   0   0   0    0 |
          {4} | 0 0    0   0   0   0   0   0    0 |
          {4} | 0 0    0   x_1 0   0   0   0    0 |
          {4} | 0 -x_1 0   0   0   0   0   0    0 |
          {4} | 0 0    0   0   0   x_1 0   0    0 |
          {4} | 0 0    0   0   0   0   0   0    0 |
          {4} | 0 0    0   0   0   0   0   0    0 |
          {4} | 0 0    0   0   0   0   0   0    0 |
          {4} | 0 x_1  0   0   0   0   0   0    0 |
          {4} | 0 0    0   0   0   0   0   -x_1 0 |
          {4} | 0 0    0   0   0   0   0   0    0 |
          {4} | 0 0    0   0   0   0   0   0    0 |
          {4} | 0 0    0   0   0   0   0   0    0 |
          {4} | 0 0    0   0   0   0   0   0    0 |
          {4} | 0 0    0   0   0   0   0   0    0 |

alpha_3 = {5} | 0             |
          {5} | 0             |
          {5} | 0             |
          {5} | x_1x_5x_7x_9  |
          {5} | 0             |
          {5} | 0             |
          {5} | -x_1x_4x_7x_9 |
          {5} | 0             |
          {5} | -x_1x_3x_7x_9 |
          {5} | 0             |
          {5} | 0             |
          {5} | -x_1x_4x_6x_9 |
          {5} | 0             |
          {5} | -x_1x_3x_6x_9 |
          {5} | 0             |
          {5} | -x_1x_3x_5x_9 |


------------------------------------------------------------------------------------------------------------------------

beta_1 = | 0 0 -x_1x_4x_6x_9 0 -x_1x_3x_6x_9 0 -x_1x_3x_5x_9 0 0 x_1x_4x_7x_9 0 x_1x_3x_7x_9 -x_1x_5x_7x_9 0 0 0 |

beta_2 = {4} | 0    0   0 0 0 0 0 0    0   0 0 0 0    0 0    0 0 0 0 0 0 0 0 0 0 0    0 0    0 0    |
         {4} | -x_1 0   0 0 0 0 0 -x_1 0   0 0 0 -x_1 0 0    0 0 0 0 0 0 0 0 0 0 0    0 0    0 0    |
         {4} | 0    0   0 0 0 0 0 0    0   0 0 0 0    0 0    0 0 0 0 0 0 0 0 0 0 -x_9 0 0    0 0    |
         {4} | 0    0   0 0 0 0 0 0    0   0 0 0 0    0 -x_1 0 0 0 0 0 0 0 0 0 0 0    0 0    0 0    |
         {4} | 0    0   0 0 0 0 0 0    0   0 0 0 0    0 0    0 0 0 0 0 0 0 0 0 0 0    0 -x_9 0 0    |
         {4} | 0    0   0 0 0 0 0 0    x_1 0 0 0 0    0 0    0 0 0 0 0 0 0 0 0 0 0    0 0    0 0    |
         {4} | 0    0   0 0 0 0 0 0    0   0 0 0 0    0 0    0 0 0 0 0 0 0 0 0 0 0    0 0    0 -x_9 |
         {4} | 0    x_1 0 0 0 0 0 0    0   0 0 0 0    0 0    0 0 0 0 0 0 0 0 0 0 0    0 0    0 0    |
         {4} | 0    0   0 0 0 0 0 0    0   0 0 0 0    0 0    0 0 0 0 0 0 0 0 0 0 0    0 0    0 0    |

beta_3 = {5} | 0    0    0 0 0 0   0 0 0 -x_8 0    0 0    0 0    0 |
         {5} | 0    0    0 0 0 0   0 0 0 0    -x_9 0 0    0 0    0 |
         {5} | 0    -x_1 0 0 0 0   0 0 0 0    0    0 0    0 0    0 |
         {5} | 0    0    0 0 0 0   0 0 0 0    0    0 -x_9 0 0    0 |
         {5} | -x_1 0    0 0 0 0   0 0 0 0    0    0 0    0 0    0 |
         {5} | 0    0    0 0 0 0   0 0 0 0    0    0 0    0 -x_9 0 |
         {5} | 0    0    0 0 0 x_1 0 0 0 0    0    0 0    0 0    0 |
         {5} | 0    0    0 0 0 0   0 0 0 -x_9 0    0 0    0 0    0 |
         {5} | 0    0    0 0 0 0   0 0 0 0    -x_1 0 0    0 0    0 |


------------------------------------------------------------------------------------------------------------------------

u = -1

------------------------------------------------------------------------------------------------------------------------

h_1 = 0

h_2 = 0

h_3 = 0


------------------------------------------------------------------------------------------------------------------------

f_1 = | x_2x_4x_6x_8 x_3x_5x_7x_9 x_1x_4x_6x_8 x_2x_5x_7x_9 x_1x_3x_6x_8 x_2x_4x_7x_9 x_1x_3x_5x_8 x_2x_4x_6x_9 x_1x_3x_5x_7 x_10x_2x_4x_6 x_10x_3x_5x_7 x_10zx_4x_6-x_1x_4x_6x_9 x_10x_2x_5x_7 x_10zx_3x_6-x_1x_3x_6x_9 x_10x_2x_4x_7 x_10zx_3x_5-x_1x_3x_5x_9 x_10x_2x_4x_8 x_10x_3x_5x_8 -x_10zx_4x_7+x_1x_4x_7x_9 x_10x_2x_5x_8 -x_10zx_3x_7+x_1x_3x_7x_9 x_10zx_5x_7-x_1x_5x_7x_9 x_10x_3x_6x_8 x_10x_4x_6x_8 x_10x_2x_6x_8 |

f_2 = | 0    x_1  0    0    0    0    0    0    -x_9 0    0   0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0   0    0   0    0    0    0    0    0    0    x_10 0    0    0    0    0    0    0    0    |
      | -x_1 0    x_2  0    0    0    0    0    0    -x_1 0   0    0    0    0    0    -x_1 0    0    0    0    -x_1 0    0    0    0    0    0    0    0   0    0   0    0    0    0    0    0    0    0    x_10 0    0    0    0    0    0    0    |
      | 0    -x_2 0    x_3  0    0    0    0    0    0    0   0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0   0    0   0    0    -x_9 0    0    0    0    0    0    x_10 0    0    0    0    0    0    |
      | 0    0    -x_3 0    x_4  0    0    0    0    0    0   0    0    0    0    0    0    0    0    0    0    0    0    -x_1 0    0    0    0    0    0   0    0   0    0    0    0    0    0    0    0    0    0    x_10 0    0    0    0    0    |
      | 0    0    0    -x_4 0    x_5  0    0    0    0    0   0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0   0    0   0    0    0    0    -x_9 0    0    0    0    0    0    x_10 0    0    0    0    |
      | 0    0    0    0    -x_5 0    x_6  0    0    0    0   0    0    0    0    0    0    x_1  0    0    0    0    0    0    0    0    0    0    0    0   0    0   0    0    0    0    0    0    0    0    0    0    0    0    x_10 0    0    0    |
      | 0    0    0    0    0    -x_6 0    x_7  0    0    0   0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0   0    0   0    0    0    0    0    0    -x_9 0    0    0    0    0    0    x_10 0    0    |
      | 0    0    0    0    0    0    -x_7 0    x_8  0    x_1 0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0   0    0   0    0    0    0    0    0    0    0    0    0    0    0    0    0    x_10 0    |
      | x_9  0    0    0    0    0    0    -x_8 0    0    0   0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0   0    0   0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    x_10 |
      | 0    0    0    0    0    0    0    0    0    0    -z  0    0    0    0    x_7  0    0    0    0    0    0    0    0    0    0    0    0    0    0   0    0   -x_8 0    0    0    0    0    0    -x_8 0    0    0    0    0    0    -x_9 0    |
      | 0    0    0    0    0    0    0    0    0    z    0   -x_2 0    0    0    0    z    0    0    0    0    z    0    0    0    0    0    0    0    0   0    0   0    -x_8 0    0    0    0    0    0    -x_9 0    0    0    0    0    0    -x_1 |
      | 0    0    0    0    0    0    0    0    0    0    x_2 0    -x_3 0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    x_7 0    0   0    0    -x_8 0    0    0    0    0    0    0    0    0    0    0    0    0    |
      | 0    0    0    0    0    0    0    0    0    0    0   x_3  0    -x_4 0    0    0    0    0    0    0    0    0    z    0    0    0    0    0    0   0    0   0    0    0    -x_8 0    0    0    0    0    0    -x_9 0    0    0    0    0    |
      | 0    0    0    0    0    0    0    0    0    0    0   0    x_4  0    -x_5 0    0    0    0    0    0    0    0    0    0    0    0    0    0    0   0    x_7 0    0    0    0    -x_8 0    0    0    0    0    0    0    0    0    0    0    |
      | 0    0    0    0    0    0    0    0    0    0    0   0    0    x_5  0    -x_6 0    -z   0    0    0    0    0    0    0    0    0    0    0    0   0    0   0    0    0    0    0    -x_8 0    0    0    0    0    0    -x_9 0    0    0    |
      | 0    0    0    0    0    0    0    0    0    -x_7 0   0    0    0    x_6  0    0    0    0    0    0    0    0    0    0    0    0    0    0    0   0    0   0    0    0    0    0    0    -x_8 0    0    0    0    0    0    0    0    0    |
      | 0    0    0    0    0    0    0    0    0    0    0   0    0    0    0    0    0    0    0    0    -x_5 0    0    0    0    0    0    x_6  0    0   0    0   x_6  0    0    0    0    x_7  0    0    0    0    0    0    0    0    0    0    |
      | 0    0    0    0    0    0    0    0    0    0    0   0    0    0    0    0    0    0    x_2  0    0    0    0    0    0    0    0    0    x_6  0   0    0   0    x_7  0    0    0    0    z    0    0    0    0    0    0    -x_1 0    0    |
      | 0    0    0    0    0    0    0    0    0    0    0   0    0    0    0    0    0    -x_2 0    x_3  0    0    -x_5 0    0    0    0    0    0    x_6 0    0   0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    |
      | 0    0    0    0    0    0    0    0    0    0    0   0    0    0    0    0    0    0    -x_3 0    x_4  0    0    0    0    0    0    0    0    0   x_6  0   0    0    0    x_7  0    0    0    0    0    0    0    0    0    0    0    0    |
      | 0    0    0    0    0    0    0    0    0    0    0   0    0    0    0    0    x_5  0    0    -x_4 0    0    0    0    0    0    0    0    0    0   0    x_6 0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    |
      | 0    0    0    0    0    0    0    0    0    0    0   0    0    0    0    0    0    0    0    0    0    -x_3 -x_4 -x_2 0    0    0    0    0    0   0    0   0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    |
      | 0    0    0    0    0    0    0    0    0    0    0   0    0    0    0    0    0    0    0    0    0    0    0    0    0    -x_2 x_4  0    -x_5 0   0    0   0    0    0    0    z    0    0    0    0    0    0    -x_1 0    0    0    0    |
      | 0    0    0    0    0    0    0    0    0    0    0   0    0    0    0    0    0    0    0    0    0    0    0    0    x_2  0    -x_3 0    0    0   0    0   0    0    z    0    0    0    0    0    0    -x_1 0    0    0    0    0    0    |
      | 0    0    0    0    0    0    0    0    0    0    0   0    0    0    0    0    0    0    0    0    0    0    0    0    -x_4 x_3  0    -x_4 0    0   -x_5 0   0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    |

f_3 = | 0    0    0    0    0    0    0    0    0    -x_8 0    0    0    0    0    0    -x_10 0     0     0     0     0     0     0     0     |
      | 0    0    0    0    0    0    0    0    0    0    -x_9 0    0    0    0    0    0     -x_10 0     0     0     0     0     0     0     |
      | 0    -x_1 0    0    0    0    0    0    0    0    0    0    0    0    0    0    0     0     -x_10 0     0     0     0     0     0     |
      | 0    0    0    0    0    0    0    0    0    0    0    0    -x_9 0    0    0    0     0     0     -x_10 0     0     0     0     0     |
      | -x_1 0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0     0     0     0     -x_10 0     0     0     0     |
      | 0    0    0    0    0    0    0    0    0    0    0    0    0    0    -x_9 0    0     0     0     0     0     -x_10 0     0     0     |
      | 0    0    0    0    0    x_1  0    0    0    0    0    0    0    0    0    0    0     0     0     0     0     0     -x_10 0     0     |
      | 0    0    0    0    0    0    0    0    0    -x_9 0    0    0    0    0    0    0     0     0     0     0     0     0     -x_10 0     |
      | 0    0    0    0    0    0    0    0    0    0    -x_1 0    0    0    0    0    0     0     0     0     0     0     0     0     -x_10 |
      | 0    0    0    0    x_6  0    0    0    0    x_8  0    0    0    0    0    0    0     0     0     0     0     0     0     0     0     |
      | 0    0    0    0    0    x_7  0    0    0    0    x_8  0    0    0    0    0    0     0     0     0     0     0     0     0     0     |
      | 0    -z   0    0    0    0    0    0    0    0    0    x_8  0    0    0    0    0     0     -x_9  0     0     0     0     0     0     |
      | 0    0    0    0    0    0    0    x_7  0    0    0    0    x_8  0    0    0    0     0     0     0     0     0     0     0     0     |
      | -z   0    0    0    0    0    0    0    0    0    0    0    0    x_8  0    0    0     0     0     0     -x_9  0     0     0     0     |
      | 0    0    0    0    x_7  0    0    0    0    0    0    0    0    0    x_8  0    0     0     0     0     0     0     0     0     0     |
      | 0    0    0    0    0    z    0    0    0    0    0    0    0    0    0    x_8  0     0     0     0     0     0     -x_9  0     0     |
      | 0    0    -x_4 0    -x_6 0    0    0    0    0    0    0    0    0    0    0    0     0     0     0     0     0     0     0     0     |
      | -x_5 0    0    0    0    -x_6 0    0    0    0    0    0    0    0    0    0    0     0     0     0     0     0     0     0     0     |
      | 0    0    0    0    0    0    -x_6 0    0    0    0    x_7  0    0    0    0    0     0     0     0     0     0     0     0     0     |
      | 0    0    -x_5 0    0    0    0    -x_6 0    0    0    0    0    0    0    0    0     0     0     0     0     0     0     0     0     |
      | 0    0    0    0    0    0    0    0    -x_6 0    0    0    0    x_7  0    0    0     0     0     0     0     0     0     0     0     |
      | 0    -x_2 x_4  0    0    0    0    0    0    0    0    0    0    0    0    0    0     0     0     0     0     0     0     0     0     |
      | x_2  0    -x_3 0    0    0    0    0    0    0    0    0    0    0    0    0    0     0     0     0     0     0     0     0     0     |
      | -x_4 x_3  0    0    0    0    0    0    0    0    0    0    0    0    0    0    0     0     0     0     0     0     0     0     0     |
      | 0    0    0    -x_3 0    0    0    0    0    0    -z   0    0    0    0    0    0     -x_1  0     0     0     0     0     0     0     |
      | 0    0    0    -x_4 0    0    -x_5 0    0    0    0    0    0    0    0    0    0     0     0     0     0     0     0     0     0     |
      | 0    0    0    -x_2 0    0    0    0    0    0    0    0    -z   0    0    0    0     0     0     -x_1  0     0     0     0     0     |
      | 0    0    0    0    0    0    0    0    -x_5 0    z    0    0    0    0    0    0     x_1   0     0     0     0     0     0     0     |
      | 0    0    0    0    0    0    x_2  0    0    0    0    0    0    0    -z   0    0     0     0     0     0     -x_1  0     0     0     |
      | 0    0    0    0    0    -x_2 0    x_3  0    0    0    0    0    0    0    0    0     0     0     0     0     0     0     0     0     |
      | 0    0    0    0    0    0    -x_3 0    x_4  0    0    0    0    0    0    0    0     0     0     0     0     0     0     0     0     |
      | 0    0    0    0    x_5  0    0    -x_4 0    0    0    0    0    0    0    0    0     0     0     0     0     0     0     0     0     |
      | 0    0    0    0    0    0    0    0    0    0    -z   0    0    0    0    x_7  0     -x_1  0     0     0     0     0     0     0     |
      | 0    0    0    0    0    0    0    0    0    z    0    -x_2 0    0    0    0    0     0     0     0     0     0     0     x_1   0     |
      | 0    0    0    0    0    0    0    0    0    0    x_2  0    -x_3 0    0    0    0     0     0     0     0     0     0     0     0     |
      | 0    0    0    0    0    0    0    0    0    0    0    x_3  0    -x_4 0    0    0     0     0     0     0     0     0     0     0     |
      | 0    0    0    0    0    0    0    0    0    0    0    0    x_4  0    -x_5 0    0     0     0     0     0     0     0     0     0     |
      | 0    0    0    0    0    0    0    0    0    0    0    0    0    x_5  0    -x_6 0     0     0     0     0     0     0     0     0     |
      | 0    0    0    0    0    0    0    0    0    -x_7 0    0    0    0    x_6  0    0     0     0     0     0     0     0     0     0     |
      | 0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0     x_1   0     0     0     0     0     0     -x_9  |
      | 0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    -x_1  0     x_2   0     0     0     0     0     0     |
      | 0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0     -x_2  0     x_3   0     0     0     0     0     |
      | 0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0     0     -x_3  0     x_4   0     0     0     0     |
      | 0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0     0     0     -x_4  0     x_5   0     0     0     |
      | 0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0     0     0     0     -x_5  0     x_6   0     0     |
      | 0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0     0     0     0     0     -x_6  0     x_7   0     |
      | 0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0     0     0     0     0     0     -x_7  0     x_8   |
      | 0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    x_9   0     0     0     0     0     0     -x_8  0     |

f_4 = | -x_10x_3x_6x_8            |
      | -x_10x_4x_6x_8            |
      | -x_10x_2x_6x_8            |
      | x_10zx_5x_7-x_1x_5x_7x_9  |
      | x_10x_2x_4x_8             |
      | x_10x_3x_5x_8             |
      | -x_10zx_4x_7+x_1x_4x_7x_9 |
      | x_10x_2x_5x_8             |
      | -x_10zx_3x_7+x_1x_3x_7x_9 |
      | -x_10x_2x_4x_6            |
      | -x_10x_3x_5x_7            |
      | -x_10zx_4x_6+x_1x_4x_6x_9 |
      | -x_10x_2x_5x_7            |
      | -x_10zx_3x_6+x_1x_3x_6x_9 |
      | -x_10x_2x_4x_7            |
      | -x_10zx_3x_5+x_1x_3x_5x_9 |
      | x_2x_4x_6x_8              |
      | x_3x_5x_7x_9              |
      | x_1x_4x_6x_8              |
      | x_2x_5x_7x_9              |
      | x_1x_3x_6x_8              |
      | x_2x_4x_7x_9              |
      | x_1x_3x_5x_8              |
      | x_2x_4x_6x_9              |
      | x_1x_3x_5x_7              |


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