<!DOCTYPE para PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
          "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
<para>
The equation 
<informalequation>
  <alt>e^(pi*i) + 1 = 0</alt>
  <graphic fileref="figures/epi10.png"/>
</informalequation>
is delightful because it joins together five of the most
important mathematical constants.
</para>