it;
          &lt; 0:  if INFO = -i, the i-th argument had an illegal
                value.
          &gt; 0:  if incorrect rank decisions were revealed during the
                triangularization phase. This failure is not likely
                to occur. The possible values are:
          = 1:  if incorrect dimensions of a full column rank
                submatrix;
          = 2:  if incorrect dimensions of a full row rank
                submatrix.

</PRE>
<A name="Method"><B><FONT SIZE="+1">Method</F