ment of NZ contains
          the number of zeros of the transfer function G(i,j) from
          the j-th input to the i-th output.

  LDNZ    INTEGER
          The leading dimension of array NZ.  LDNZ &gt;= max(1,P).

  NP      (output) INTEGER array, dimension (LDNP,M)
          The leading P-by-M part of this array contains the numbers
          of poles of the elements of the transfer function
          matrix G. Specifically, the (i,j) element of NP contains
          the number of poles of the transfe