2 <!DOCTYPE para PUBLIC
"-//OASIS//DTD DocBook XML V4.1.2//EN" "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
4 Einstien's most famous equation,
5 <inlineequation><inlinemediaobject><imageobject><imagedata fileref=
"figures/emc2.gif"/></imageobject><textobject><phrase>E=mc
<superscript>2</superscript></phrase></textobject></inlinemediaobject></inlineequation>, expresses the relationship between matter