1 <?xml version="1.0" encoding="utf-8"?>
\r
2 <!DOCTYPE document PUBLIC "+//IDN docutils.sourceforge.net//DTD Docutils Generic//EN//XML" "http://docutils.sourceforge.net/docs/ref/docutils.dtd">
\r
3 <!-- Generated by Docutils 0.9 -->
\r
4 <document source="math.rst"><paragraph>is <math>|f(M)| = ad - bc</math>.</paragraph></document>