# frobenius_norm¶

Frobenius norm. Also known as Schatten 2-norm or Hilbert-Schmidt norm.

$||\mathbf{A}||_F = \sqrt{\mathrm{trace}(\mathbf{A^*A})}$
param a

Complex matrix.

type a

np.ndarray

returns

Frobenius norm of the matrix a.

rtype

float

References

Antoulas, A. Approximation to Large Scale Dynamical Systems. SIAM 2005. Ch 3, Eq 3.5