,
        <a href="ComputationsBook/chapters/d-modules/chapter-wrapper.ps">postscript</a>,
        <a href="ComputationsBook/chapters/d-modules/chapter-wrapper.pdf">pdf</a>.<br/>

	       In this chapter we introduce the reader to some ideas from the world of
	       differential operators. We show how to use these concepts in conjunction
	       with <i>Macaulay2</i> to obtain new information about polynomials and their algebraic
	       varieties.</li>


   </ul>
   </li>
</ul>
