# scipy.linalg.interpolative.estimate_spectral_norm_diff

scipy.linalg.interpolative.estimate_spectral_norm_diff(A, B, its=20)

  Estimate spectral norm of the difference of two matrices by the randomized power method.

  Parameters
    A `scipy.sparse.linalg.LinearOperator`

      First matrix given as a `scipy.sparse.linalg.LinearOperator` with the matvec and rmatvec methods (to apply the matrix and its adjoint).

    B `scipy.sparse.linalg.LinearOperator`

      Second matrix given as a `scipy.sparse.linalg.LinearOperator` with the matvec and rmatvec methods (to apply the matrix and its adjoint).

    its int, optional

      Number of power method iterations.

  Returns
    float

      Spectral norm estimate of matrix difference.

scipy.linalg.interpolative.estimate_spectral_norm scipy.linalg.interpolative.estimate_rank