ular part of the symmetric matrix R; the strictly
          upper triangular part of the array is used as workspace.
          On exit, the leading M-by-M upper triangular part (if
          UPLO = 'U'), or lower triangular part (if UPLO = 'L'), of
          this array contains the corresponding triangular part of
                              _
          the computed matrix R. If beta &lt;&gt; 0, the remaining
          strictly triangular part of this array contains the
          corresponding part of the