he leading dimension of the array A1.
          If TYPEG = 'D',                   LDA1 &gt;= MAX(1,K);
          if TYPEG = 'C'  or  TYPEG = 'R',  LDA1 &gt;= 1.

  A2      (input)  DOUBLE PRECISION array,
          if TYPEG = 'D'  or  TYPEG = 'C',  dimension (LDA2, P-K);
          if TYPEG = 'R',                   dimension (LDA2, K).
          On entry, if TYPEG = 'D'  or  TYPEG = 'C', the leading
          K-by-(P-K) part of this array must contain the matrix
          A2 as returned by MB02CU.
          