It is shown that the system considered in the numerical example of the above paper belongs to a class of systems (with

states and

inputs) for which the set of all minimum-time dead-beat (MTDB) controllers is parameterized by an arbitrary matrix of order
![[(\\lambda + 1)r - n]x[n - \\lambda r]](/images/tex/3176.gif)
where λ is the greatest integer less than the ratio

. Since the example treats the case of

, the MDTB controller is parameterized by a single scalar element.