Starting with polynomial:
P : 3/2*t^2 - 1/2
Extension levels are: 2 7
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Trying to find an order 7 Kronrod extension for:
P1 : 3/2*t^2 - 1/2
Solvable: 1
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Ending with final polynomial:
P : 3/2*t^9 - 151/50*t^7 + 1281/650*t^5 - 651/1430*t^3 + 56/2145*t
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Computing nodes and weights
  current precision for roots: 53
  current precision for roots: 106
 current precision for weights: 53
Linear system for weights solvable: 1
  current precision for roots: 106
  current precision for roots: 212
 current precision for weights: 106
Linear system for weights solvable: 1
Sufficient bits for target precision reached
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The nodes are:
| (0.96392874096524810675 - 4.7068747365290705425e-184j)  +/-  (4.5e-62, 4.5e-62j)
| (-0.57735026918962576451 + 3.1601331849255234355e-187j)  +/-  (2.34e-62, 2.34e-62j)
| (-0.96392874096524810675 + 8.6970994968653432617e-190j)  +/-  (4.5e-62, 4.5e-62j)
| (0.29036229308829455553 - 1.0033306956520399657e-197j)  +/-  (3.78e-63, 3.78e-63j)
| (0.81641357233552832956 - 1.9010915662951598235e-210j)  +/-  (7.75e-62, 7.75e-62j)
| (0.57735026918962576451 - 4.4263237302544522647e-221j)  +/-  (2.34e-62, 2.34e-62j)
| (0 + 0j)  +/-  (0, 0j)
| (-0.81641357233552832956 + 2.5160737381238801985e-233j)  +/-  (7.75e-62, 7.75e-62j)
| (-0.29036229308829455553 + 0j)  +/-  (3.78e-63, 3.78e-63j)
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The weights are:
| (0.09183134281931075609 + 6.2304887395731024535e-184j)  +/-  (1.7e-24, 4.56e-55j)
| (0.27158424140821458508 + 2.0919934833686017307e-184j)  +/-  (6.72e-25, 1.8e-55j)
| (0.09183134281931075609 + 2.2392040450831816998e-185j)  +/-  (3.31e-25, 8.89e-56j)
| (0.29380794845818344106 - 7.6343937053369907837e-184j)  +/-  (3.33e-25, 8.92e-56j)
| (0.19910299792653611573 - 1.0599282198218723928e-183j)  +/-  (1.48e-25, 3.97e-56j)
| (0.27158424140821458508 + 8.3351460879659817106e-184j)  +/-  (1.26e-25, 3.4e-56j)
| (0.28734693877551020408 + 6.3322903758858563398e-184j)  +/-  (5.32e-26, 1.42e-56j)
| (0.19910299792653611573 - 8.7648527473075194617e-185j)  +/-  (6.01e-27, 1.8e-57j)
| (0.29380794845818344106 - 4.1036779130153937467e-184j)  +/-  (3.2e-26, 8.25e-57j)
