is perpetual, world-wide, and
        provided on a royalty-free basis. UChicago Argonne, LLC and all other
        contributors make no representations as to the suitability and
        operability of this software for any purpose. It is provided "as is"
        without express or implied warranty.
      </p>

      <a href="https://www.mcs.anl.gov/petsc/miscellaneous/index.html">Principal Software authors</a>

      <ul>
        <li>Mathematics and Computer Science Division</li>
        <li>Argonne Nation