sh</a>,
          commands to compile and run the sample program.
        </li>
        <li>
          <a href = "band_qr_prb_output.txt">band_qr_prb_output.txt</a>,
          the output file.
        </li>
      </ul>
    </p>

    <h3 align = "center">
      List of Routines:
    </h3>

    <p>
      <ul>
        <li>
          <b>DGBBQR2</b> QR factors an M by N band matrix in GB format, without blocking.
        </li>
        <li>
          <b>DGBBQRF</b> QR factors an M by N band matrix in GB format, u