Starting with polynomial:
P : 3/2*t^2 - 1/2
Extension levels are: 2 3 6
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Trying to find an order 3 Kronrod extension for:
P1 : 3/2*t^2 - 1/2
Solvable: 1
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Trying to find an order 6 Kronrod extension for:
P2 : 3/2*t^5 - 25/14*t^3 + 3/7*t
Solvable: 1
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Ending with final polynomial:
P : 3/2*t^11 - 2114365/488852*t^9 + 2243043/488852*t^7 - 1964259/907868*t^5 + 386565/907868*t^3 - 11007/453934*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:
| (0.98785368285261173498 - 8.9862696385882157329e-185j)  +/-  (9.25e-61, 9.25e-61j)
| (-0.79008322340119373077 - 1.3071459992191937847e-186j)  +/-  (5.66e-61, 5.66e-61j)
| (-0.98785368285261173498 + 1.6219389182662182494e-190j)  +/-  (8.92e-61, 8.92e-61j)
| (-0.57735026918962576451 - 2.8253792389561445434e-194j)  +/-  (9.34e-62, 9.34e-62j)
| (0.79008322340119373077 + 5.4347079347818831476e-197j)  +/-  (5.71e-61, 5.71e-61j)
| (0.57735026918962576451 - 1.1680306583317461956e-206j)  +/-  (9.12e-62, 9.12e-62j)
| (-8.7025065595786735085e-215 - 6.9620052476629388068e-215j)  +/-  (1.23e-213, 1.23e-213j)
| (-0.92582009977255146157 + 1.9927101949680688418e-221j)  +/-  (1.47e-60, 1.47e-60j)
| (0.30476216915276288265 + 8.3734934004762733007e-231j)  +/-  (6.8e-63, 6.8e-63j)
| (-0.30476216915276288265 - 6.7486356625303392967e-240j)  +/-  (6.8e-63, 6.8e-63j)
| (0.92582009977255146157 + 4.1007334754958658921e-243j)  +/-  (1.3e-60, 1.3e-60j)
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The weights are:
| (0.032504464966416607955 + 8.4933521620271760054e-185j)  +/-  (1.95e-23, 2.84e-52j)
| (0.17578249094347492146 + 5.0285188284849023202e-186j)  +/-  (8.52e-24, 1.24e-52j)
| (0.032504464966416607955 + 1.8758462948441125063e-186j)  +/-  (3.47e-24, 5.06e-53j)
| (0.24664959084586528098 - 4.4082205259506954983e-186j)  +/-  (3.32e-24, 4.85e-53j)
| (0.17578249094347492146 + 4.304804683213116709e-185j)  +/-  (1.28e-24, 1.86e-53j)
| (0.24664959084586528098 - 2.0785813659727633215e-185j)  +/-  (1.06e-24, 1.55e-53j)
| (0.31026774307543688068 - 8.1698201716784465898e-186j)  +/-  (4.31e-25, 6.3e-54j)
| (0.096107693081145066337 - 5.1279582868768352621e-186j)  +/-  (7.6e-25, 1.11e-53j)
| (0.29382188862537968293 + 1.2132816413098483543e-185j)  +/-  (2.39e-25, 3.47e-54j)
| (0.29382188862537968293 + 6.0539449003916820513e-186j)  +/-  (2.79e-25, 4.13e-54j)
| (0.096107693081145066337 - 1.14580882244988497e-184j)  +/-  (1.27e-25, 1.77e-54j)
