Starting with polynomial:
P : 3/2*t^2 - 1/2
Extension levels are: 2 6 9
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Trying to find an order 6 Kronrod extension for:
P1 : 3/2*t^2 - 1/2
Solvable: 1
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Trying to find an order 9 Kronrod extension for:
P2 : 3/2*t^8 - 161/52*t^6 + 105/52*t^4 - 245/572*t^2 + 25/1716
Solvable: 1
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Ending with final polynomial:
P : 3/2*t^17 - 254210989592309/36656488650340*t^15 + 1854202443865275/139294656871292*t^13 - 1613387760735757/117864709660324*t^11 + 113900576146157429/14047330396789524*t^9 - 2811372282650667/1017922492520980*t^7 + 2374935978717729/4682443465596508*t^5 - 2598365956055557/60871765052754604*t^3 + 720075718862805/669589415580300644*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
  current precision for roots: 212
  current precision for roots: 424
 current precision for weights: 212
Linear system for weights solvable: 1
Sufficient bits for target precision reached
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The nodes are:
| (0.99512883823022382365 - 2.8997130717328452671e-325j)  +/-  (9.23e-122, 9.23e-122j)
| (-0.98219129046748981137 + 2.7049499114003858472e-351j)  +/-  (1.33e-121, 1.33e-121j)
| (-0.93616508049401472034 - 3.1432084095216248311e-380j)  +/-  (6.57e-122, 6.57e-122j)
| (-0.99512883823022382365 + 2.5846574434684713296e-408j)  +/-  (9.52e-122, 9.52e-122j)
| (0.98219129046748981137 + 1.9535887897294702532e-418j)  +/-  (1.58e-121, 1.58e-121j)
| (0.93616508049401472034 + 9.7966570665218436546e-422j)  +/-  (5.52e-122, 5.52e-122j)
| (-0.2041968861768067152 - 1.2492681430533812132e-427j)  +/-  (1.08e-126, 1.08e-126j)
| (-0.85110112875893547946 - 1.3536122422980392157e-427j)  +/-  (1.56e-122, 1.56e-122j)
| (-0.39949622101019859834 - 8.8118516322325568072e-437j)  +/-  (2.34e-125, 2.34e-125j)
| (0.39949622101019859834 + 1.3700924596274072784e-437j)  +/-  (2.18e-125, 2.18e-125j)
| (0.85110112875893547946 - 6.6795277368676685606e-434j)  +/-  (1.68e-122, 1.68e-122j)
| (0.2041968861768067152 + 8.9987625726707874011e-438j)  +/-  (1.08e-126, 1.08e-126j)
| (-0.57735026918962576451 - 2.2660659224148952916e-435j)  +/-  (2.9e-124, 2.9e-124j)
| (-0.73001032987209524291 + 1.9662560717899498156e-435j)  +/-  (3.04e-123, 3.04e-123j)
| (-9.0553354595172644284e-440 - 1.2173272973215146044e-439j)  +/-  (2.58e-438, 2.58e-438j)
| (0.73001032987209524291 + 2.5609541767884693289e-436j)  +/-  (2.89e-123, 2.89e-123j)
| (0.57735026918962576451 - 1.1845101248651166752e-438j)  +/-  (3.44e-124, 3.44e-124j)
-------------------------------------------------
The weights are:
| (0.0086976824159557751648 + 2.9292618415078259497e-325j)  +/-  (3.22e-47, 2.82e-105j)
| (0.025343136967710311979 - 2.1836417654760029638e-327j)  +/-  (1.46e-47, 1.27e-105j)
| (0.066054579365516958641 + 1.5861853973747795076e-327j)  +/-  (6.3e-48, 5.51e-106j)
| (0.0086976824159557751648 + 1.2672119642408065719e-327j)  +/-  (7.83e-48, 6.84e-106j)
| (0.025343136967710311979 - 3.3373857982405372151e-325j)  +/-  (2.38e-48, 2.08e-106j)
| (0.066054579365516958641 + 5.1953781942189576133e-326j)  +/-  (5.85e-49, 5.11e-107j)
| (0.20121465138293995525 - 1.0869748985691946316e-327j)  +/-  (1.01e-49, 8.79e-108j)
| (0.10364549744521314319 - 1.2212834435729450626e-327j)  +/-  (3.66e-49, 3.2e-107j)
| (0.18795199320900918755 + 9.9399527471811216035e-328j)  +/-  (7.47e-50, 6.53e-108j)
| (0.18795199320900918755 + 2.3273586415707814099e-327j)  +/-  (8.53e-51, 7.45e-109j)
| (0.10364549744521314319 - 1.5655113172243910346e-326j)  +/-  (1.41e-50, 1.23e-108j)
| (0.20121465138293995525 - 1.64822897122092024e-327j)  +/-  (6.78e-51, 5.92e-109j)
| (0.16645483493006551827 - 9.8109531555704748891e-328j)  +/-  (8.57e-51, 7.5e-109j)
| (0.13779230779235142598 + 1.0481978072564606775e-327j)  +/-  (7.66e-51, 6.71e-109j)
| (0.20569063298247544795 + 1.2840777276062885742e-327j)  +/-  (4.05e-51, 3.54e-109j)
| (0.13779230779235142598 + 6.8206746651365698678e-327j)  +/-  (6.59e-52, 5.85e-110j)
| (0.16645483493006551827 - 3.6927501801822276262e-327j)  +/-  (6.23e-52, 5.35e-110j)
