
<!DOCTYPE math
  PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<math xmlns="http://www.w3.org/1998/Math/MathML">
<mtext> Theorem 1: </mtext>
<mtext> &amp;ThinSpace; </mtext>
<mtext> &amp;ThickSpace;&amp;ThickSpace; </mtext>
<mtext> /* a comment */ </mtext>
</math>