Estimate spectral norm of a matrix by the randomized power method.
A : scipy.sparse.linalg.LinearOperator
Matrix given as a scipy.sparse.linalg.LinearOperator with the matvec and rmatvec methods (to apply the matrix and its adjoint).
its : int
Number of power method iterations.
float
Spectral norm estimate.
scipy.linalg.interpolative.svd
scipy.linalg.interpolative.estimate_spectral_norm_diff
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