 FACT = 'N', specifies which triangle of
          the matrices G, or Q and R, is stored, as follows:
          = 'U':  Upper triangle is stored;
          = 'L':  Lower triangle is stored.

  JOBL    CHARACTER*1
          Specifies whether or not the matrix L is zero, as follows:
          = 'Z':  L is zero;
          = 'N':  L is nonzero.
          JOBL is not used if JOBB = 'G' and JOBL = 'Z' is assumed.
          SLICOT Library routine SB02MT should be called just before
          SG02AD, for obtaining 