t^2+1 0 [-0.+1.j  0.-1.j]
t^2-1 2 [ 1. -1.]
(t-1)^2(t^2+1) 1 [-2.08634076e-16+1.00000000e+00j -2.08634076e-16-1.00000000e+00j
  1.00000000e+00+2.34171891e-08j  1.00000000e+00-2.34171891e-08j]
(t-1)(t-2)(t-3) 3 [3. 2. 1.]
t^4+t+1/2 0 [ 0.63600982+0.89307569j  0.63600982-0.89307569j -0.63600982+0.10692431j
 -0.63600982-0.10692431j]
exact ok True numeric min/max of P on circle 1.5163869528562573e-14 16.969171977301396 sign changes 0
ray angles (deg): [174.275, -174.275, 174.847, 174.702, 172.562, -6.492, -175.342, 173.704, 174.103]
python3 test_sturm.py  0.65s user 0.04s system 89% cpu 0.773 total
