B;
          = .TRUE.:   op( B ) = B'.

</PRE>
<B>Input/Output Parameters</B>
<PRE>
  N       (input) INTEGER
          The order of the matrix Q. N &gt;= 0.

  K       (input) INTEGER
          The offset of the reduction. Elements below the K-th
          subdiagonal in the first NB columns of op(A) are
          reduced to zero. K &gt;= 0.

  NB      (input) INTEGER
          The number of columns/rows to be reduced. N &gt; NB &gt;= 0.

  A       (input/output) DOUBLE PRECISION array, dimension
         