exponents e* = (-0.18271900153639156, -0.1809796744363755, 769.0851161513428, 825.7277931734245)
1 + 4 e1 = 0.26912399385443375 (> 0, so M1..M4 are convergent integrals)
solution (M2-orthonormal coordinates) |v| = 1; c normalised by c1: [ 1.      +0.000000e+00j -1.002078+2.350000e-04j -2.562347-1.871437e+00j
  2.700639+1.772187e+00j]
|M4| / int|f|^4 = 1.973e-14 ;  int|f|^2 = |v|^2 = 1 ;  int|f|^4 = 256.5317
residuals in v-coordinates: |M3| = 1.07e-14, |M2| = 5.92e-17
