Une bien jolie matrice sous la main, et on aimerait bien trouver son inverse:

from numpy import *
from numpy.linalg import *
a=array([[ 2.34635649, -1.36700425,  2.62820772, -1.93379678],
       [-0.1883465 ,  0.24001098, -0.16084023,  0.06769621],
       [-0.45821679,  0.66405128, -0.93736998,  0.47861882],
       [-1.23335039,  0.54581151, -1.04212985,  1.05308756]])

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