f the positive generator to be processed.
          On entry, if TYPEG = 'R', the leading (P-K)-by-N part of
          this array must contain the second part of the positive
          generator to be processed.
          On exit, if TYPEG = 'D'  or  TYPEG = 'C', the leading
          N-by-(P-K) part of this array contains the second part of
          the transformed positive generator.
          On exit, if TYPEG = 'R', the leading (P-K)-by-N part of
          this array contains the second part of the tra