def __init__(self, input_dim, covariance_matrix, variance=<NUM_LIT:1.>, active_dims=None, name='<STR_LIT>'):
super(Fixed, self).__init__(input_dim, variance, active_dims, name)<EOL>self.fixed_K = covariance_matrix<EOL>
:param input_dim: the number of input dimensions
:type input_dim: int
:param variance: the variance of the kernel
:type variance: float