rix A in the pencil
          sE(x)-A(x),
             where  x = eps,inf  if MODE = 'B' or 'T',
             or     x = eps      if MODE = 'S'.

  NBLCKI  (output) INTEGER
          If MODE = 'S', the number of diagonal submatrices in the
          pencil sE(inf)-A(inf). If MODE = 'B' or 'T' then
          NBLCKI = 0.

  IMUK    (output) INTEGER array, dimension (MAX(N,M+1))
          The leading NBLCKS elements of this array contain the
          column dimensions mu(1),...,mu(NBLCKS) of the submatrices
 