<?xml version="1.0"?>
<div><span class="kw">theorem </span><a NAME="T22"><span class="comment"><font color="firebrick">:: FINANCE2:22</font></span><br/></a><div class="add"> <a href="prob_1.html#K12" title="PROB_1:func.12">Borel_Sets</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="prob_1.html#K9" title="PROB_1:func.9">sigma</a> <a href="finance2.html#K1" title="FINANCE2:func.1">Family_of_halflines2</a></div></div>
