public UncertainValue Autocovariance(
	int k
)Public Function Autocovariance ( 
	k As Integer
) As UncertainValuepublic:
UncertainValue Autocovariance(
	int k
)member Autocovariance : 
        k : int -> UncertainValue Note that, unlike the sample auto-covariance (Autocovariance), and unlike the true population auto-covariance, the estimated population auto-covariance is not guaranteed to be positive definite when expressed as a matrix Ci,j = c[|i-j|].