Hello,
I have this symmetric matrix:

A=Matrix([[0, 0.623433638694170, 1, 5.42879559377412], [0.623433638694170, 
0, 1, 6.81321272473753], [1, 1, 0, 0], [5.42879559377412, 6.81321272473753, 
0, 0]])

I did

A.cholesky()

getting:

⎡ 0      0       0    0  ⎤
⎢                           ⎥
⎢zoo   zoo    0    0  ⎥
⎢                           ⎥
⎢zoo  nan    nan  0 ⎥
⎢                           ⎥  
⎣zoo  nan  nan  nan⎦

What can I do to get the correct result?
Thanks for the time,

Andrea Fresu

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