Matrix square root.
A : (N, N) array_like
Matrix whose square root to evaluate
disp : bool, optional
Print warning if error in the result is estimated large instead of returning estimated error. (Default: True)
sgrtm : (N, N) ndarray
Value of the sign function at A
errest : float
(if disp == False) Frobenius norm of the estimated error, ||err||_F / ||A||_F
(if disp == False)
Frobenius norm of the estimated error, ||err||_F / ||A||_F
Notes
Uses algorithm by Nicholas J. Higham
scipy.linalg.signm
scipy.linalg.funm
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