&gt; 0 and (TYPEG = 'D' or TYPEG = 'C'),
                                     LDB &gt;= MAX(1,K);
          if Q &gt; 0 and TYPEG = 'R',  LDB &gt;= Q.

  F1      (input/output)  DOUBLE PRECISION array,
          if TYPEG = 'D'  or  TYPEG = 'C',  dimension (LDF1, K);
          if TYPEG = 'R',                   dimension (LDF1, N).
          On entry, if TYPEG = 'D'  or  TYPEG = 'C', the leading
          N-by-K part of this array must contain the first part
          of the positive generator to be processed