>

> I confirm your results.

>

> I also tried a SISO system

>

> a3=tf( [2 24],[1 4 7] )

> a4=a3*a3

> a5=a3*a4

> a6=a4*a3

> but this worked correctly.

>

> a simpler example of your equation is:

> a1 = tf({[2 24],[12];[1 48 0],[2 24]},{[-1 24],[-1 24];[-4 96],[-1 24]});

> a2=a1*a1;

> a3=a2*a1

> a4=a1*a2

>

>

>

> --

> DAS

>

Thanks Doug. So, bug? Or some expected behavior I do not fathom yet?

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