def check_elements(shapein):
N = criterions.Norm2()
I = pyoperators.IdentityOperator(shapein=shapein)
C0 = criterions.CriterionElement(N, I)
assert C0(np.ones(shapein)) == np.prod(shapein)
def check_dnorm2_mul(a, value):
N = criterions.Norm2()
N2 = a * N
vec = value * np.ones(1)
testing.assert_array_equal(a * N.diff(vec), N2.diff(vec))
def check_dnorm2(size, value):
N = criterions.Norm2()
testing.assert_array_equal(N.diff(value * np.ones(size)),
2 * value * np.ones(size))
def check_norm2_mul(a, value):
N = criterions.Norm2()
N2 = a * N
vec = value * np.ones(1)
assert a * N(vec) == N2(vec)
def check_norm2(size, value):
N = criterions.Norm2()
assert N(value * np.ones(size)) == size * value**2