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<div><span class="kw">theorem </span><a NAME="T21"><span class="comment"><font color="firebrick">:: FINANCE2:21</font></span><br/></a><div class="add"> <a href="borsuk_5.html#K1" title="BORSUK_5:func.1">IRRAT</a>  is    <a href="prob_1.html#M1" title="PROB_1:mode.1">Event</a> of  <a href="prob_1.html#K12" title="PROB_1:func.12">Borel_Sets</a> </div></div>
