          (0   T  )
                 (     22)

          where T  , T   and T   are N-by-N matrices.
                 11   12      22

  LDT     INTEGER
          The leading dimension of array T.
          LDT &gt;= MAX(1,2*N+M) if JOBB = 'B';
          LDT &gt;= MAX(1,2*N)   if JOBB = 'G'.

  U       (output) DOUBLE PRECISION array, dimension (LDU,2*N)
          The leading 2N-by-2N part of this array contains the right
          transformation matrix U which reduces the 2N-by-2N matrix
          pencil 