def test_weighted_frobenius_norm(self):
m = Matrix.identity(2)
self.assertEqual(weighted_frobenius_norm(m), 2**.5)
m = Matrix([[-1, 1], [0, 2]])
self.assertEqual(weighted_frobenius_norm(m), 6**.5)
def test_sum_of_squared_corfficients(self):
m = Matrix.identity(2)
self.assertEqual(sum_of_squared_coefficietns(m), 2)
m = Matrix([[-1, 1], [0, 2]])
self.assertEqual(sum_of_squared_coefficietns(m), 6)