          The number of state variables, i.e., the order of the
          matrix A.  N &gt;= 0.

  M       (input) INTEGER
          The number of system inputs.  M &gt;= 0.

  P       (input) INTEGER
          The number of system outputs.  P &gt;= 0.

  A       (input) DOUBLE PRECISION array, dimension (LDA,N)
          The leading N-by-N part of this array must contain the
          state dynamics matrix A of the system.

  LDA     INTEGER
          The leading dimension of array A.  LDA &gt;= MAX(1,N).
